anyone out there that could suggest the
best way to remove the passenger window to take photos...

I know about unscrewing the retainer from the window... but just wanted to
know if there are any points to watch out for .. best speed etc...



First, I don't really believe you want to REMOVE the window...just allow it to
open to allow you to shoot through the window opening.

Second, the retaining parts vary on different models, so be careful with the
parts. Also, many of the 150/152/172s have long since lost the screw, so it may
not be an issue.

Third, don't rest your arms, elbows or the camera on any part of the airframe,
keep the camera back inside the cabin out of the slipstream, etc., etc.

On some Cessnas, you'll want to put some tape or slip a piece of hose over the
door-holding-open thingie on the underside of the wing to prevent damage to the
window in the fully open position.

Now, the important part... in flight, grasp the window latch firmly as you open
the window, hang on tightly and SLOWLY open the window until it is held against
the bottom of the wing by the slipstream.

Finally, I shoot aerial photos at a SAFE altitude, typically 1500' agl and at
low cruise speed - none of this slow flight, flaps down stuff.