Good site here
http://www.apolloarchive.com/apollo_gallery.html
Pretty well all the film rolls from the apollo archives.
When you look at the photos in sequence there are quite a few duffs.
I used to do underwater photography a bit and you get used to no real view finder and parallax issues.
Just aim and shoot and then bracket with iso.
Then drop your slide film off to get processed. When i got them back on avereage 5% to 10% were usable
It was overexposed, underexposed, bad framing, out of focus, to much stobe fill, and every now and then one was good.
Astronauts did a lot of underwater training including photography to get used to the cameras.
Ive been an apollo fan for years and looking at my library I think ive read everything that ever been written from traing manuals to full flight plans and then debriefing and how these astronauts had to be test pilots, photographers, geologists, engineers, mathmations, astronomists, and statesmen all in one.
I still can't believe that conspiracy theories still exist about the moon landings.
500 000 people involved with Apollo have kept one of the biggest secrets ever and a lot of scientists are in on it as well !!