Apollo Discussions > The Reality of Apollo

Apollo rover TV camera question...

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Trebor:
Quick question....
How was the exposure controlled on the camera, was it automatic or controlled from earth?

ChrLz:
Not 100% sure, but according to:
http://www.hq.nasa.gov/alsj/GCTA-Manual.pdf
it did have an ALC (Automatic Light Control) function with both peak and averaging functions, and it appears to have been remotely operable.

ka9q:
I'm pretty sure I saw the exposure level being manually changed, so i wasn't just an automatic gain control.

dwight:
Yep it had both. There was a built in ALC (and the camera was rugggedly tested by pointing it at the sun) and Ed Fendell could control it from the ground.

ka9q:
Tested by pointing at the sun? What changes were made to make that possible?

I was reminded of Apollo 12 almost every time I saw one of those videos taken from a shuttle SRB. They frequently captured the sun but weren't bothered at all.

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