Plenty of work in the dark room- extra exposure on the suit whilst masking the remainder of the print to equalise the lighting. Same on the Rover in the background.

You'll see it a lot as well in shots of the Lunar Lander- detail of the underside that should be darker

https://www.hq.nasa.gov/alsj/a11/AS11-40-5868HR.jpg

I could spend hours looking at the photos

https://www.hq.nasa.gov/alsj/a11/

If you need an Xmas stocking filler then ask for In The Shadow of the Moon DVD

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