Two things.
A. Why did so many companies make 135mm f/3.5 lenses during the film days? I saw Canon, Nikon, Olympus, Pentax, minolta and Zeiss (and konica soligor?) all produced 135mm f/3.5 lenses back in the pre EF mount film days.
B. why do we always base crop factors on the diagonal instead of the vertical for different aspect ratios? The olympus 75mm f/1.8 is a weird 150mm based on the diagonal, but if you take the vertical its a pretty normal 138mm (most lenses aren't exactly the focal length they say) f/3.5 like the old film lenses. Same as the pentax 645 150mm, which is a 93mm on the diagonal but an 86.5mm vertical. so both lenses look more like a 135mm or 85mm that you cropped the sides off to make an 8x10

Are there any good resources on optics design? I want to read about why pancake lenses are always 28mm or 38-40mm and why 50mm for range finders and like 55/58mm for SLRs were the easiest lenses to make sharp and fast that covered the image circle

What is the "medium format" look? I hear gay retards say you can't get it on 645 which makes no sense to me because 645 is bigger than digital medium format and only slightly smaller than 6x6 so it wouldn't make sense to show up in 6x6 and not 645. the thing that I thought was the "medium format" look I guess is really a large format thing? The thing I think of is wide angle but shallow DoF like a brenizer method portrait to me is the "medium format" look. because if its just normal shallow DoF there are 35mm/full frame lenses with apertures as wide as most 645/6x6 lenses and there are full frame digishit and 35mm slide films that are around as grain/noise free as 120 film

My brother bought one of these. I don't think it was this model, but it was a mamiya TLR. were they just used as studio camera's for portraits? I have a pentax645 and it seems way more usable than a tlr camera

Idkkjustakidd

Apparently the new ttartisan camera is going to cost in the range of $600-$800. What do you think of the price?

WHAT IS THE SOURCE OF THE PHOTOGRAPHY OVER HERE I CANNOT FIND IT ON YANDEX/TINEYE/GOOGLE LENS PLEASE HELP ME

Are drum roll scanners obsolete? Pixel shift dlsm scanning absolutely moggs them in terms of resolution and details.

3d printed 6x17 camera & then pixel shift scanning with a fuji gfx100s II. Or just take digital pics with the fuji gfx in the first place for the most resolution possible

What's the real resolution of film? How much detail can you get from a 35mm negative?

What makes it work?