It is also a matter of size. Many of the early press photos were 4½x6½ (Bain, Thompson), 5x7 or 6x8 (Acme, Pacific & Atlantic, Underwood & Underwood, International Film Service, International Newsreel). 8x10 was not regularly used until the 1930’s and 6x8 was still a common size even into the 1940’s. It raises a red flag when I see a photo that is 8x10 that claims to be very early. I have hundreds of pre-WWII press photos in my archives/collection and there may be a few late 1930's that are that big, but not many. It became such a common size to print for 35mm film (though incorrect in ratio) that it is accepted as the standard size.
David and Rhys may agree or disagree with me. I would welcome their thoughts on this.
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'Integrity is what you do when no one is looking'
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