use of longer lenses (more compression)
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Longer lenses dont have more compression
Stand at point A with a 24mm and a 100
shoot two images of subject at point B
crop the 24 to the FOV of the 100 and the 'image' is exactly the same
(likely not enough pixels due to the crop though)
Distant subject are compressed
and to fill the frame with a distant subject you need a long lens
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In term of 'the 3d look' I think it is really visible with a certain set of parameters
reasonable apperture, say 4 or 5.6 (enough to get sharpness across the subject)
and reasonable ditance say shooting a full length maybe 3 meters
and a reasonably close background say 3m behind the subject
A TYPICAL INDOOR FASHION MAGAZINE IMAGE IN OTHER WORDS
at super close say a cropped headshot shot wide, or near infinity stopped down, say a landscape, the DOF or lack of it is apparent in all formats
hence why MF Dig and also 67 etc is loved by fashion shooters in the main
IMO
SMM