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Discussion in 'Large Format Cameras and Accessories' started by Colin Corneau, Nov 16, 2009.
Title says it all...I'm just starting out with the big boy and wondered
It's usually considered a normal lens--use it like you would a 50mm on a 35mm camera, or thereabouts. Since the shape of the frame is different, there really aren't "equivalents."
This might help give you an idea of FOV 'equivalents'.
kodak pro guide
A lens with a focal length of 45mm is closest with 50mm being runner up.
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Yup, widish normal lens focal length.
If you are making an 8x10 from the 35mm, a 300mm is like a 38mm.
If you are making a 6.3 x 9.5 (an 8x10 neg counting the border) the 300 is like a 45mm on 35.
In any case, between a 35mm and 50mm.
A classic 2 lens outfit for 8x10 has been a 10" and either a 14" or 19".
Diagonal of 135 is 43.2mm.
Diagonal of 8x10 is 305mm.
300/305 = 0.9836
0.9836 x 43.2 = 42.49mm
Can't get more precise than that unless you measure the aperture opening of a specific 135 camera and of a specific 8x10 film holder. But DF is right... if you crop 135 to 8x10 that changes the formula.
Diagonal of cropped 135 is 38.4mm.
0.9836 x 38.4 = 37.8mm
So a 35mm lens on a cropped 135 image (24x30mm) is closest to matching a normal (305mm) 8x10 lens and is even closer matching FOV of a 300mm.
mikes got it