It certainly is not due to the light aperture being changed on the camera because only the light behind the lander alters and not the actual lander shadow.

Most certainly it is due to the aperture being opened. It has all the hallmarks of a decrease in f-stop. Apparently the author believes a dark shadow should somehow have gotten lighter. That's not necessarily the case. One can open the lens by one or two stops without a dark shadow necessarily going from black to dark gray. Nevertheless Armstrong gets brighter, and the exterior bezel of the window gets lighter.

Clearly this person has no experience with photographic exposure.

I'm assuming this is refering to the brightening of the film when Armstrong is going down the ladder. This is covered in the transcripts and the audio from the first EVA. From the Apollo 11 ALSJ...

109:23:25 McCandless: Buzz, this is Houston. F/2 (and)...

109:23:28 Armstrong: Okay, I'm at the...(Listens)

109:23:29 McCandless: ...1/160th second for shadow photography on the sequence camera.

109:23:35 Aldrin: Okay.

This coincides with the sudden brightening of the image.

Note: There is also evidence of radio delay, causeing Armstrong to stop what he is saying in the middle of his sentence. Of course, the delay effects would be reversed from the astronauts point of view, but we're hearing and reading the timings as heard from the ground.

<font size=-1>[ This Message was edited by: johnwitts on 2002-05-27 17:48 ]</font>