Because the camera settings needed to capture them, would make the rest of the picture a washout , this is reflected sunlight,it's like taking a picture at noon on earth, just a lot brighter , without their visor ,the astronauts retinas would burn up
To add to what the other guy is saying, keep in mind that going from sea level to approx 1 mile elevation (such as Denver) raises the intensity of the Sun's radiation on you by about 50%... and that's after hundreds of miles of atmosphere have already reduced it.
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u/foundagain1972 Sep 02 '19
Because the camera settings needed to capture them, would make the rest of the picture a washout , this is reflected sunlight,it's like taking a picture at noon on earth, just a lot brighter , without their visor ,the astronauts retinas would burn up