SUN GLASSES

[[email protected]]

I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
The ones I'm looking at are also anti-glare lenses.

Thanks
Glen

[noel.wade]

On Jun 12, 3:20*pm, wrote:
> I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
> The ones I'm looking at are also anti-glare lenses.
>
> Thanks
> Glen

If you use _ANY_ electronics in the cockpit at all (even a digital-
display variometer), you do _NOT_ want polarized lenses. The lenses
will appear to "black-out" those displays at some (or all) viewing
angles. Also, some canopy materials will cause them to look like a
checkerboard when viewed through polarized lenses. I won't bore you
with the science/physics, but in general you're best off with non-
polarized lenses for aviation use.

--Noel

[[email protected]]

On Wednesday, June 12, 2013 6:20:46 PM UTC-4, wrote:
> I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
>
> The ones I'm looking at are also anti-glare lenses.
>
>
>
> Thanks
>
> Glen

Never mind, I searched and see there are lots of post about this subject.
Thanks

[Ramy]

On Wednesday, June 12, 2013 3:27:26 PM UTC-7, noel.wade wrote:
> On Jun 12, 3:20*pm, wrote:
>
> > I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
>
> > The ones I'm looking at are also anti-glare lenses.
>
> >
>
> > Thanks
>
> > Glen
>
>
>
> If you use _ANY_ electronics in the cockpit at all (even a digital-
>
> display variometer), you do _NOT_ want polarized lenses. The lenses
>
> will appear to "black-out" those displays at some (or all) viewing
>
> angles. Also, some canopy materials will cause them to look like a
>
> checkerboard when viewed through polarized lenses. I won't bore you
>
> with the science/physics, but in general you're best off with non-
>
> polarized lenses for aviation use.
>
>
>
> --Noel

This is incorrect. I am using tons of electronics in the cockpit with polarized with no problems. the only device I ever had a problem was with the rectangular butterfly display in landscape mode, but resolved it. I wouldnt fly with regular sunglasses as I find the polarized superior due to reducing canopy glare and increasing detection of clouds and traffic.

Ramy

[jfitch]

On Wednesday, June 12, 2013 10:14:14 PM UTC-7, Ramy wrote:
> On Wednesday, June 12, 2013 3:27:26 PM UTC-7, noel.wade wrote:
>
> > On Jun 12, 3:20*pm, wrote:
>
> >
>
> > > I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
>
> >
>
> > > The ones I'm looking at are also anti-glare lenses.
>
> >
>
> > >
>
> >
>
> > > Thanks
>
> >
>
> > > Glen
>
> >
>
> >
>
> >
>
> > If you use _ANY_ electronics in the cockpit at all (even a digital-
>
> >
>
> > display variometer), you do _NOT_ want polarized lenses. The lenses
>
> >
>
> > will appear to "black-out" those displays at some (or all) viewing
>
> >
>
> > angles. Also, some canopy materials will cause them to look like a
>
> >
>
> > checkerboard when viewed through polarized lenses. I won't bore you
>
> >
>
> > with the science/physics, but in general you're best off with non-
>
> >
>
> > polarized lenses for aviation use.
>
> >
>
> >
>
> >
>
> > --Noel
>
>
>
> This is incorrect. I am using tons of electronics in the cockpit with polarized with no problems. the only device I ever had a problem was with the rectangular butterfly display in landscape mode, but resolved it. I wouldnt fly with regular sunglasses as I find the polarized superior due to reducing canopy glare and increasing detection of clouds and traffic.
>
>
>
> Ramy

Polarized glasses may, or may not blacken an LCD display: it depends on the technology, the angle of the polarizing filter, etc. It is easy enough to try with the electronics you have, to discover if there will be a problem. I prefer polarized glasses as well, could not wear them with an iPaq PDA in the cockpit, but with an Avier/V2/Oudie they are fine.

[Jim White[_3_]]

Assuming that you fly with your head held perpendicular to the wings
(rather than the ground and cloudscape) then polarised glasses will give
you a different picture when circling to flying straight. Try it on the
ground - look through a polarised lens at the clouds then rotate 60
degrees.

IMO you are best off with a good anti uv tint like Zeiss Sky which is quite
yellow.

Jim

[Doug Mueller]

DO NOT FLY WITH NON POLORIZED LENS!
by doing so you trick your eye into opening wider because of the
shade. Remember polorization is used to protect from UV light. If
you open your eye wider by non polarized glass you expose your
eye to that UV light. You will damage your eye much quicker. It is
not a function of can you see your instruments or not. Do not be
mislead into this kind of thinking......
Most glider canopies are not made with polorized protection.

[[email protected]]

I know this has been discussed to death in previous threads bit I find it interesting/humorous to see DO NOT use polarized lenses and DO NOT use NON polarized in the same thread. Again. I use 'em.

[John Galloway[_1_]]

At 11:02 13 June 2013, Doug Mueller wrote:
>DO NOT FLY WITH NON POLORIZED LENS!
>by doing so you trick your eye into opening wider because of the
>shade. Remember polorization is used to protect from UV light.
If
>you open your eye wider by non polarized glass you expose your
>eye to that UV light. You will damage your eye much quicker. It
is
>not a function of can you see your instruments or not. Do not be
>mislead into this kind of thinking......
>Most glider canopies are not made with polorized protection.
>

That's ridiculous. That advice is valid only for the sort of cheap
children's or other useless coloured lenses that have little or no
UV filtering. All aviation, and other general and sporting use,
non-polarised lenses from reputable manufacturers have a high
level of UV filtering.

[[email protected]]

On Wednesday, June 12, 2013 6:20:46 PM UTC-4, wrote:
> I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
>
> The ones I'm looking at are also anti-glare lenses.
>
>
>
> Thanks
>
> Glen

amber colored serengeti drivers all day.

[Richard Brisbourne[_2_]]

At 11:02 13 June 2013, Doug Mueller wrote:
>DO NOT FLY WITH NON POLORIZED LENS!
>by doing so you trick your eye into opening wider
because of the
>shade. Remember polorization is used to protect
from UV light. If
>you open your eye wider by non polarized glass you
expose your
>eye to that UV light. You will damage your eye much
quicker. It is
>not a function of can you see your instruments or
not. Do not be
>mislead into this kind of thinking......
>Most glider canopies are not made with polorized
protection.
>

Er no, actually. Polarised sunglasses block a portion
of the incident light according to how it is polarised,
not by wavelength. Reflected light is partly polarised,
which is why polarised sunglasses reduce glare.

UV protection is accorded by the tinting medium.
There are plenty of substances out there that block
UV, just as there are tints that block other
wavelengths (hence coloured lenses).

There are a number of standards around for
manufacture of sunglasses based on opacity to UV
(no agreed international standard yet), including an
EN standard in Europe and an ANSI standard in the
US. These specify the maximum transmittance in the
UV part of the spectrum as a percentage of the
transmittance in the visible part.

Naturally your eyes will open wider if the amount of
visible light getting to them drops- the point is that a
very much less of the light getting through is UV.

I don't know about your part of the world, but in
Europe most good sunglasses are sold with a CE
mark indicating that 95% of radiation at 380Nm is
blocked.

None of this has anything to do with polarisation.

In short, check the specified UV transmittance.
Polarisation is just a personal preference.

[Jim White[_3_]]

At 11:02 13 June 2013, Doug Mueller wrote:
>DO NOT FLY WITH NON POLORIZED LENS!
>by doing so you trick your eye into opening wider because of the
>shade. Remember polorization is used to protect from UV light. If
>you open your eye wider by non polarized glass you expose your
>eye to that UV light. You will damage your eye much quicker. It is
>not a function of can you see your instruments or not. Do not be
>mislead into this kind of thinking......
>Most glider canopies are not made with polorized protection.
>
>
Absolute Nonsense. The UV that is damaging to eyes is that with a
wavelength less than 320nm. Looking at the chart on the Zeiss website here


http://tinyurl.com/qxfa6kj

you will see that nearly all the light below 500nm is blocked by the skylet
fun tint.

Furthermore, depending upon the type of perspex, your canopy will cut UV
below 400nm by a further 99%.

[JohnDeRosa]

Suggestion: Buy a pair of polarized cheap sun glasses (sounds like a ZZ Top song). Then try them in your cockpit. If you like them, only they buy a nice polarize pair.

If I remember correctly in aviation catalogs I only see non-polarized. I read at Sporty's the following;

--- Why we don't sell polarized sunglasses ---
Many sunglasses today are polarized, meaning they use an optical filter to reduce glare. While this is fine for fishing or driving, it's a bad idea for pilots. That's because many cockpit instruments and glass panels have polarized faces, and polarized sunglasses will render these unreadable. In addition, the iPad screen will be blacked out in portrait orientation when wearing polarized sunglasses. Sporty's sells a wide variety of high quality sunglasses that do an excellent job of reducing glare--but without polarization.
----------------------------------------------

I use non-polarized Serengeti's. The better question is ... what tint is recommended for the lenses? Brown? Green? Gray? Yellow? Chartreuse?

- John

[Andy[_1_]]

On Jun 13, 4:02*am, Doug Mueller > wrote:
> DO NOT FLY WITH NON POLORIZED LENS!
> by doing so you trick your eye into opening wider because of the
> shade. Remember polorization is used to protect from UV light. If
> you open your eye wider by non polarized glass you expose your
> eye to that UV light. You will damage your eye much quicker. It is
> not a function of can you see your instruments or not. Do not be
> mislead into this kind of thinking......
> Most glider canopies are not made with polorized protection.

There has been some amazing misinformation posted on RAS but this post
has to take first prize!

Andy

[[email protected]]

On Thursday, June 13, 2013 1:14:14 AM UTC-4, Ramy wrote:
> On Wednesday, June 12, 2013 3:27:26 PM UTC-7, noel.wade wrote: > On Jun 12, 3:20*pm, wrote: > > > I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders??? > > > The ones I'm looking at are also anti-glare lenses. > > > > > > Thanks > > > Glen > > > > If you use _ANY_ electronics in the cockpit at all (even a digital- > > display variometer), you do _NOT_ want polarized lenses. The lenses > > will appear to "black-out" those displays at some (or all) viewing > > angles. Also, some canopy materials will cause them to look like a > > checkerboard when viewed through polarized lenses. I won't bore you > > with the science/physics, but in general you're best off with non- > > polarized lenses for aviation use. > > > > --Noel This is incorrect. I am using tons of electronics in the cockpit with polarized with no problems. the only device I ever had a problem was with the rectangular butterfly display in landscape mode, but resolved it. I wouldnt fly with regular sunglasses as I find the polarized superior due to reducing canopy glare and increasing detection of clouds and traffic. Ramy

This agrees exactly with my experience. I have been using brown tinted polarized glasses for more than 30 years with good results. The Butterfly display is the only one that there was a problem with. problem solved by scrapping the display.
UH

[Doug Mueller]

At 14:01 13 June 2013, Andy wrote:
>On Jun 13, 4:02=A0am, Doug Mueller wrote:
>> DO NOT FLY WITH NON POLORIZED LENS!
>> by doing so you trick your eye into opening wider because of
the
>> shade. Remember polorization is used to protect from UV
light. If
>> you open your eye wider by non polarized glass you expose
your
>> eye to that UV light. You will damage your eye much
quicker. It is
>> not a function of can you see your instruments or not. Do
not be
>> mislead into this kind of thinking......
>> Most glider canopies are not made with polorized protection.
>
>There has been some amazing misinformation posted on RAS
but this post
>has to take first prize!
>
>Andy
There was no intention of misinformation. I am stating pure and
simple facts. Anti glare does not necessarily filter out UV light.
The comment about pilot sunglasses is a consideration.
Professional pilots look through polorized glass in their cockpits.
Looking through two pieces of polorized glass will give the
blanking effect that has been mentioned on this thread. In the
desert southwest antiglare is not sufficient protection from UV
light. It might be in places where the sun is not as intense. The
coments I made about the eye are not incorrect either. Thanks
for the prize Andy what ever it is. Just trying to protect glider
pilots so you can see me flying. Oh ya thats what FLARM is for.

[Matt Herron Jr.]

If you are old enough to need readers to see the instruments (like I am), finding good quality polarized glasses with built in readers can be challenging. Maui Jim makes a few versions and they are very high quality, but very expensive too. I settled on SunCloud that has a few models with standard power readers for $60-$80 new on Amazon.

[Gary Ittner[_3_]]

JohnDeRosa wrote:

>I use non-polarized Serengeti's. The better question is ... what tint is
> >recommended for the lenses? Brown? Green? Gray? Yellow? Chartreuse?


Rose, of course. You must view the world through rose-colored glasses to
confidently fly cross country without an engine.

P7 unit

[noel.wade]

P7 has the best answer...

But Let's step back to facts, shall we?

Polarized lenses literally block light, unless the light-waves are
oriented at a specific angle to the lens.

Almost all LCDs (including PDAs, cell-phones, iPads, and even simple
displays like Cambridge *-NAV devices or digial variometers) have 1 or
2 polarized screens, as part of how they work. See here:
http://en.wikipedia.org/wiki/Liquid-crystal_display

Stacking multiple polarizing filters in the proper orientation lets
light pass through. But stacking them in the wrong orientation causes
the light passing through the first filter to be BLOCKED by the
second.

Your polarized sunglasses _are_ a "second filter", sitting between
your eyeballs and the LCD screens in your cockpit. Ergo, if the
orientation of your sunglasses' polarized surface is not near the same
angle of your electronic displays, the visibility of your instruments
will be negatively impacted. Here are two video demonstrations of
this:
http://www.youtube.com/watch?v=GkLBMAY406Q
http://www.youtube.com/watch?v=HcQWAqL2JUw

Polarized sunglasses are not all manufactured the same; and even
different batches of the same sunglasses may not always have the
orientation to the polarized lenses - don't assume that because your
glasses work for you, that you can recommend them to others or that
you can simply buy another pair of the same, and have them work
identically. Additionally, just because you find glasses that may work
with _your_ cockpit instruments and canopy, do _not_ assume that it
will work with _all_ instruments or canopies. Finally, don't assume
that all of your instrument displays have the same polarization on
their screens. I have polarized lenses that work fine when viewing
some of my instruments, but not with others (unless you rotate the
glasses 90-degrees). Also, these polarized sunglasses worked fine
with my DG-300 canopy, but created horrible moire & checkerboard
patterns on a couple of Diamond DA-20 rental aircraft canopies.

If you're going to fly with a lot of cockpit electronics, I strongly
recommend against polarized lenses because you don't want to be
distracted or fumbling with your instruments because of this effect.
There are plenty of effective non-polarized sunglasses out there that
give you good visibility and protection.

Lastly, if you're going to be flying in a club or rental environment,
where you switch ships with any regularity, do NOT assume that
polarized sunglasses which work in one cockpit will work in another.

--Noel

[[email protected]]

All polycarbonate lenses block UV inherently. Acrylic plastic doen not unless treated. If the poly carbonate hald is treated then the UV blocking is enhanced. This is without tinting. Add tinting ro block visible light.
Any reasonable sunglasses will state the UV protection and almost any polycarbonate lens glasses will be over 95% whthout ocating or polarization.
Add polarazation if you want it. Filters to block the blue haze will help visibility.
Personally I have a set of 40 year old Ray Ban Aviators with another new set of lenses. Polycarbonate, tinted with Cryzal coating and I am delighted!
I liked then so much I ordered a new 3029 s and clear lenses mad exactly the samw with the caotings ets. Since they are Polycarbonate they will be over 95% UV blocking eventhough they are clear.

[Ramy]

On Thursday, June 13, 2013 3:12:14 PM UTC-7, noel.wade wrote:
> P7 has the best answer...
>
>
>
> But Let's step back to facts, shall we?
>
>
>
> Polarized lenses literally block light, unless the light-waves are
>
> oriented at a specific angle to the lens.
>
>
>
> Almost all LCDs (including PDAs, cell-phones, iPads, and even simple
>
> displays like Cambridge *-NAV devices or digial variometers) have 1 or
>
> 2 polarized screens, as part of how they work. See here:
>
> http://en.wikipedia.org/wiki/Liquid-crystal_display
>
>
>
> Stacking multiple polarizing filters in the proper orientation lets
>
> light pass through. But stacking them in the wrong orientation causes
>
> the light passing through the first filter to be BLOCKED by the
>
> second.
>
>
>
> Your polarized sunglasses _are_ a "second filter", sitting between
>
> your eyeballs and the LCD screens in your cockpit. Ergo, if the
>
> orientation of your sunglasses' polarized surface is not near the same
>
> angle of your electronic displays, the visibility of your instruments
>
> will be negatively impacted. Here are two video demonstrations of
>
> this:
>
> http://www.youtube.com/watch?v=GkLBMAY406Q
>
> http://www.youtube.com/watch?v=HcQWAqL2JUw
>
>
>
> Polarized sunglasses are not all manufactured the same; and even
>
> different batches of the same sunglasses may not always have the
>
> orientation to the polarized lenses - don't assume that because your
>
> glasses work for you, that you can recommend them to others or that
>
> you can simply buy another pair of the same, and have them work
>
> identically. Additionally, just because you find glasses that may work
>
> with _your_ cockpit instruments and canopy, do _not_ assume that it
>
> will work with _all_ instruments or canopies. Finally, don't assume
>
> that all of your instrument displays have the same polarization on
>
> their screens. I have polarized lenses that work fine when viewing
>
> some of my instruments, but not with others (unless you rotate the
>
> glasses 90-degrees). Also, these polarized sunglasses worked fine
>
> with my DG-300 canopy, but created horrible moire & checkerboard
>
> patterns on a couple of Diamond DA-20 rental aircraft canopies.
>
>
>
> If you're going to fly with a lot of cockpit electronics, I strongly
>
> recommend against polarized lenses because you don't want to be
>
> distracted or fumbling with your instruments because of this effect.
>
> There are plenty of effective non-polarized sunglasses out there that
>
> give you good visibility and protection.
>
>
>
> Lastly, if you're going to be flying in a club or rental environment,
>
> where you switch ships with any regularity, do NOT assume that
>
> polarized sunglasses which work in one cockpit will work in another.
>
>
>
> --Noel

Good points.
I guess it all boils down to "it depends". Polarized glasses always worked for me in the gliders I flew, but I agree this is not always going to be the case.
So the solution is to have a spare non polarized glasses with you in case there is an issue.

Ramy

[Jeremy Keeling]

At 22:20 12 June 2013, wrote:
>I'm getting new sun glasses, should I get Polarized or not, what works
best
>for flying gliders???
>The ones I'm looking at are also anti-glare lenses.
>
>Thanks
>Glen
>

When I was in to gliding I always flew on a sunny day with Oakley wiretap
fire iridium polarized sunglassed, to be specific.
(http://www.oakley.com/products/1252/2794).

No colour loss, no glare and on a blue day you can see 'haze caps' of
thermals which would otherwise be invisible - I would recommend them.

[John Galloway[_1_]]

At 00:11 14 June 2013, Ramy wrote:
>On Thursday, June 13, 2013 3:12:14 PM UTC-7, noel.wade
wrote:
>> P7 has the best answer...
>>
>>
>>
>> But Let's step back to facts, shall we?
>>
>>
>>
>> Polarized lenses literally block light, unless the light-waves
are
>>
>> oriented at a specific angle to the lens.
>>
>>
>>
>> Almost all LCDs (including PDAs, cell-phones, iPads, and
even simple
>>
>> displays like Cambridge *-NAV devices or digial
variometers) have 1 or
>>
>> 2 polarized screens, as part of how they work. See here:
>>
>> http://en.wikipedia.org/wiki/Liquid-crystal_display
>>
>>
>>
>> Stacking multiple polarizing filters in the proper orientation
lets
>>
>> light pass through. But stacking them in the wrong
orientation causes
>>
>> the light passing through the first filter to be BLOCKED by
the
>>
>> second.
>>
>>
>>
>> Your polarized sunglasses _are_ a "second filter", sitting
between
>>
>> your eyeballs and the LCD screens in your cockpit. Ergo, if
the
>>
>> orientation of your sunglasses' polarized surface is not near
the same
>>
>> angle of your electronic displays, the visibility of your
instruments
>>
>> will be negatively impacted. Here are two video
demonstrations of
>>
>> this:
>>
>> http://www.youtube.com/watch?v=GkLBMAY406Q
>>
>> http://www.youtube.com/watch?v=HcQWAqL2JUw
>>
>>
>>
>> Polarized sunglasses are not all manufactured the same;
and even
>>
>> different batches of the same sunglasses may not always
have the
>>
>> orientation to the polarized lenses - don't assume that
because your
>>
>> glasses work for you, that you can recommend them to
others or that
>>
>> you can simply buy another pair of the same, and have
them work
>>
>> identically. Additionally, just because you find glasses that
may work
>>
>> with _your_ cockpit instruments and canopy, do _not_
assume that it
>>
>> will work with _all_ instruments or canopies. Finally, don't
assume
>>
>> that all of your instrument displays have the same
polarization on
>>
>> their screens. I have polarized lenses that work fine when
viewing
>>
>> some of my instruments, but not with others (unless you
rotate the
>>
>> glasses 90-degrees). Also, these polarized sunglasses
worked fine
>>
>> with my DG-300 canopy, but created horrible moire &
checkerboard
>>
>> patterns on a couple of Diamond DA-20 rental aircraft
canopies.
>>
>>
>>
>> If you're going to fly with a lot of cockpit electronics, I
strongly
>>
>> recommend against polarized lenses because you don't
want to be
>>
>> distracted or fumbling with your instruments because of this
effect.
>>
>> There are plenty of effective non-polarized sunglasses out
there that
>>
>> give you good visibility and protection.
>>
>>
>>
>> Lastly, if you're going to be flying in a club or rental
environment,
>>
>> where you switch ships with any regularity, do NOT assume
that
>>
>> polarized sunglasses which work in one cockpit will work in
another.
>>
>>
>>
>> --Noel
>
>Good points.
>I guess it all boils down to "it depends". Polarized glasses
always worked
>for me in the gliders I flew, but I agree this is not always going
to be
>the case.
>So the solution is to have a spare non polarized glasses with
you in case
>there is an issue.
>
>Ramy

Polarised sunglasses should genarally be expected to have
vertical polarization because the whole point about reducing
glare from water surfaces etc is that the light reflected of the
surface to the eye tends to be polarised horizontally.

On another topic - genuine question - do polarised lenses made
without a UV absorbing tint, and without a UV absorbing lens
material such as polycarbonate, reduce UV transmission more
than in proportion to the reduction in general light
transmission?

John Galloway

[Jeremy Keeling]

At 14:08 14 June 2013, John Galloway wrote:
>At 00:11 14 June 2013, Ramy wrote:
>>On Thursday, June 13, 2013 3:12:14 PM UTC-7, noel.wade
>wrote:
>>> P7 has the best answer...
>>>
>>>
>>>
>>> But Let's step back to facts, shall we?
>>>
>>>
>>>
>>> Polarized lenses literally block light, unless the light-waves
>are
>>>
>>> oriented at a specific angle to the lens.
>>>
>>>
>>>
>>> Almost all LCDs (including PDAs, cell-phones, iPads, and
>even simple
>>>
>>> displays like Cambridge *-NAV devices or digial
>variometers) have 1 or
>>>
>>> 2 polarized screens, as part of how they work. See here:
>>>
>>> http://en.wikipedia.org/wiki/Liquid-crystal_display
>>>
>>>
>>>
>>> Stacking multiple polarizing filters in the proper orientation
>lets
>>>
>>> light pass through. But stacking them in the wrong
>orientation causes
>>>
>>> the light passing through the first filter to be BLOCKED by
>the
>>>
>>> second.
>>>
>>>
>>>
>>> Your polarized sunglasses _are_ a "second filter", sitting
>between
>>>
>>> your eyeballs and the LCD screens in your cockpit. Ergo, if
>the
>>>
>>> orientation of your sunglasses' polarized surface is not near
>the same
>>>
>>> angle of your electronic displays, the visibility of your
>instruments
>>>
>>> will be negatively impacted. Here are two video
>demonstrations of
>>>
>>> this:
>>>
>>> http://www.youtube.com/watch?v=GkLBMAY406Q
>>>
>>> http://www.youtube.com/watch?v=HcQWAqL2JUw
>>>
>>>
>>>
>>> Polarized sunglasses are not all manufactured the same;
>and even
>>>
>>> different batches of the same sunglasses may not always
>have the
>>>
>>> orientation to the polarized lenses - don't assume that
>because your
>>>
>>> glasses work for you, that you can recommend them to
>others or that
>>>
>>> you can simply buy another pair of the same, and have
>them work
>>>
>>> identically. Additionally, just because you find glasses that
>may work
>>>
>>> with _your_ cockpit instruments and canopy, do _not_
>assume that it
>>>
>>> will work with _all_ instruments or canopies. Finally, don't
>assume
>>>
>>> that all of your instrument displays have the same
>polarization on
>>>
>>> their screens. I have polarized lenses that work fine when
>viewing
>>>
>>> some of my instruments, but not with others (unless you
>rotate the
>>>
>>> glasses 90-degrees). Also, these polarized sunglasses
>worked fine
>>>
>>> with my DG-300 canopy, but created horrible moire &
>checkerboard
>>>
>>> patterns on a couple of Diamond DA-20 rental aircraft
>canopies.
>>>
>>>
>>>
>>> If you're going to fly with a lot of cockpit electronics, I
>strongly
>>>
>>> recommend against polarized lenses because you don't
>want to be
>>>
>>> distracted or fumbling with your instruments because of this
>effect.
>>>
>>> There are plenty of effective non-polarized sunglasses out
>there that
>>>
>>> give you good visibility and protection.
>>>
>>>
>>>
>>> Lastly, if you're going to be flying in a club or rental
>environment,
>>>
>>> where you switch ships with any regularity, do NOT assume
>that
>>>
>>> polarized sunglasses which work in one cockpit will work in
>another.
>>>
>>>
>>>
>>> --Noel
>>
>>Good points.
>>I guess it all boils down to "it depends". Polarized glasses
>always worked
>>for me in the gliders I flew, but I agree this is not always going
>to be
>>the case.
>>So the solution is to have a spare non polarized glasses with
>you in case
>>there is an issue.
>>
>>Ramy
>
>Polarised sunglasses should genarally be expected to have
>vertical polarization because the whole point about reducing
>glare from water surfaces etc is that the light reflected of the
>surface to the eye tends to be polarised horizontally.
>
>On another topic - genuine question - do polarised lenses made
>without a UV absorbing tint, and without a UV absorbing lens
>material such as polycarbonate, reduce UV transmission more
>than in proportion to the reduction in general light
>transmission?
>
>John Galloway
>
>

re uv absorption by sunglasses with no uv absorbing lens. I have no idea,
but according to the page about my oakleys "...combines patented optics and
PLUTONITE® lens material that provides 100% UV filtering and unsurpassed
impact protection...".

Which is probably of no use to you whatsoever.

All the best.

[Eric Greenwell[_4_]]

John Galloway wrote, On 6/14/2013 7:08 AM:
>
> Polarised sunglasses should genarally be expected to have
> vertical polarization because the whole point about reducing
> glare from water surfaces etc is that the light reflected of the
> surface to the eye tends to be polarised horizontally.
>
> On another topic - genuine question - do polarised lenses made
> without a UV absorbing tint, and without a UV absorbing lens
> material such as polycarbonate, reduce UV transmission more
> than in proportion to the reduction in general light
> transmission?

Your canopy filters out most of the UVB, as will almost every pair of
sunglasses, regardless of their tint or polarization. Plastic or glass
that passes significant amounts of UVB is "special" stuff that costs
more. UVA transmission is more variable, as it takes some effort to
filter it out, so if you want to block it, look for a pair that
specifically claims to do so.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
http://tinyurl.com/yb3xywl

[Dan Marotta]

After trying a friend's Eagle Eyes (As seen on TV!!!), I found them to
improve detailed vision, especially spotting very thin dust devils. So I
bought a pair with built in readers.

They're great! I used them to take my wife for a ride in a friend's
DG-500m-22 and they were flawless. Yesterday, when I pulled down the canopy
of my LAK-17a, I found the screen of my CAI-302 to be totally black. At
first I thought it was due to the heat but, raising the glasses, I saw the
problem was with the misaligned polarization of the 302 screen with the
glasses.

I wonder if the glass in the 302 can be rotated 40-90 degrees...


"Eric Greenwell" > wrote in message
...
> John Galloway wrote, On 6/14/2013 7:08 AM:
>>
>> Polarised sunglasses should genarally be expected to have
>> vertical polarization because the whole point about reducing
>> glare from water surfaces etc is that the light reflected of the
>> surface to the eye tends to be polarised horizontally.
>>
>> On another topic - genuine question - do polarised lenses made
>> without a UV absorbing tint, and without a UV absorbing lens
>> material such as polycarbonate, reduce UV transmission more
>> than in proportion to the reduction in general light
>> transmission?
>
> Your canopy filters out most of the UVB, as will almost every pair of
> sunglasses, regardless of their tint or polarization. Plastic or glass
> that passes significant amounts of UVB is "special" stuff that costs more.
> UVA transmission is more variable, as it takes some effort to filter it
> out, so if you want to block it, look for a pair that specifically claims
> to do so.
>
> --
> Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email
> me)
> - "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
> http://tinyurl.com/yb3xywl

[Ramy]

On Sunday, June 16, 2013 9:42:52 AM UTC-7, Dan Marotta wrote:
> After trying a friend's Eagle Eyes (As seen on TV!!!), I found them to
>
> improve detailed vision, especially spotting very thin dust devils. So I
>
> bought a pair with built in readers.
>
>
>
> They're great! I used them to take my wife for a ride in a friend's
>
> DG-500m-22 and they were flawless. Yesterday, when I pulled down the canopy
>
> of my LAK-17a, I found the screen of my CAI-302 to be totally black. At
>
> first I thought it was due to the heat but, raising the glasses, I saw the
>
> problem was with the misaligned polarization of the 302 screen with the
>
> glasses.
>
>
>
> I wonder if the glass in the 302 can be rotated 40-90 degrees...
>
>
>
>
>
> "Eric Greenwell" > wrote in message
>
> ...
>
> > John Galloway wrote, On 6/14/2013 7:08 AM:
>
> >>
>
> >> Polarised sunglasses should genarally be expected to have
>
> >> vertical polarization because the whole point about reducing
>
> >> glare from water surfaces etc is that the light reflected of the
>
> >> surface to the eye tends to be polarised horizontally.
>
> >>
>
> >> On another topic - genuine question - do polarised lenses made
>
> >> without a UV absorbing tint, and without a UV absorbing lens
>
> >> material such as polycarbonate, reduce UV transmission more
>
> >> than in proportion to the reduction in general light
>
> >> transmission?
>
> >
>
> > Your canopy filters out most of the UVB, as will almost every pair of
>
> > sunglasses, regardless of their tint or polarization. Plastic or glass
>
> > that passes significant amounts of UVB is "special" stuff that costs more.
>
> > UVA transmission is more variable, as it takes some effort to filter it
>
> > out, so if you want to block it, look for a pair that specifically claims
>
> > to do so.
>
> >
>
> > --
>
> > Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email
>
> > me)
>
> > - "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
>
> > http://tinyurl.com/yb3xywl

No problem with my 302 with all polarized glasses I used. Either your glasses or your 302 polarized wrong.

Ramy

[bumper[_4_]]

I always fly with my "Zoomies" binocular glasses (as seen on TV) https://www.buyzoomies.com/

Other gliders look 300% closer, so does the ground . . . it's a truly terrifying experience. I have no idea why a wear them but everyone else should as well.

bumper

[bumper[_4_]]

On Monday, June 17, 2013 1:51:13 PM UTC-7, Ramy wrote:

>
> No problem with my 302 with all polarized glasses I used. Either your glasses or your 302 polarized wrong.
>
>
>
> Ramy

Some 302's had their polarization off by 90 degrees (I think they got a bad batch IIRC). When I bought my 302 in '03 screen blacked out with polarized glasses. Sent it in and they replaced the glass to fix this at no charge.

bumper

[Dan Marotta]

I don't know of any where to send mine now... I'll just use my older
non-polarized glasses and swap the Eagle Eyes to my car, hiking, and
kayaking.


"bumper" > wrote in message
...
> On Monday, June 17, 2013 1:51:13 PM UTC-7, Ramy wrote:
>
>>
>> No problem with my 302 with all polarized glasses I used. Either your
>> glasses or your 302 polarized wrong.
>>
>>
>>
>> Ramy
>
> Some 302's had their polarization off by 90 degrees (I think they got a
> bad batch IIRC). When I bought my 302 in '03 screen blacked out with
> polarized glasses. Sent it in and they replaced the glass to fix this at
> no charge.
>
> bumper
>

[RRK]

Skylet Fun is a high quality dip coating for the Carl Zeiss "CLARLET" lens and provides a best level of contrast. Reddish brown with approx. 70% light reduction. 100% UV protection. Ideal for diffuse, hazy light, e.g. flying.. Used by German Gliding National Team. The best stuff on earth.

[Sean F (F2)]

Costa Del Mar or Revo non polarized!

[tstock]

On Wednesday, June 12, 2013 3:20:46 PM UTC-7, wrote:
> I'm getting new sun glasses, should I get Polarized or not, what works best for flying gliders???
>
> The ones I'm looking at are also anti-glare lenses.

I remember spending big bucks on a prescription pair of polarized sun glasses. They were incredible, I loved them. When I went flying I could see every stress area in my canopy and my GPS screen was almost black.

No more polarized sunglasses for me.

[akiley]

Another option. I wear progressive glasses and I buy Solar Shield clip on, flip up pola sunglasses. (cheap on eBay but UV) Been renting power aircraft for 25 years, and I've rented lots of different gliders. Most of the time I have no noticeable problems. Most pola sun glasses that I've used are set to cut glare on the plane that includes roads, windshield glass and glare shield. Most electronics manufacturers for aircraft and automotive know this so they set the polarizing in their screens to not be effected. But once in a while you can get a total black out. Butterfly? Also hand held navigators like Android phone can be horizontal or vertical. Vertical is only slightly better running XCSoar for me. The flip up is very handy. You can have it both ways. Kind of nerdy looking flipped up, but I'm still married.

I also like what pola does to the sky. Everything is richer and the clouds seem to stand out better. I'm not convinced it's harder to spot other gliders. Pola only cuts glare at limited angles. If you get a flash of sun off a nearby glider It's rarely going to cut that totally out. And there are situations where pola will actually help you see other gliders. Pola makes blue sky darker most of the time which would increase contrast between sky and a white glider. Lastly, pola will cut some reflections in the canopy allowing you to see other gliders better.

Just my 2. Very hard to find non pola clip on, flip ups. ... Aaron

[Eurofighter]

Skylet Fun is a high quality dip coating for the Carl Zeiss "CLARLET" lens and provides a best level of contrast. Reddish brown with approx. 70% light reduction. 100% UV protection. Ideal for diffuse, hazy light, e.g. flying.. Used by German Gliding National Team. The best stuff on earth.

Hi,
I'm thinking about getting a pair of Clarlet Skylet lenses.
Do you think the 70% "Fun" lens is enough, or should I choose the 90% "Sport"?
On the Zeiss website they recommend the "Fun" for gliding and the "Sport" for flying.
Somebody was saying that the "Fun" tint isn't dark enough.
There is also an 80% "Road" lens that is suitable for driving.
Any thoughts on the subject?
Thank's