Same here, from crawling around inside an M74 armoured recovery vehicle a fair number of years ago, which has almost the same cupola as the M40, I remember the glass having a distinctly greenish tint to it.I agree, I think they should be more greenish.
I have some more trivia: I own an American M6 periscope like this one:Don't know about WWII, but I had a friend who back in the nineties subcontracted w/Lima Works to supply them w/vision blocks for Abrams tanks and they were all clear blocks of acrylic when shipped. They may have applied some coating later depending on sensors or humans looking through them. Just some trivia.
Who still has that, then?My answer to this dilemma was to use exposed 35mm film negative.
Don't they have an anti-reflective coating?It's bluish because of the reflection from the angle to the sky just like sea water isn't blue and what we see as blue is reflections from the sky.
BTW Bob, build is looking nice with paint and weathering on.
Cheers,
Richard
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