Lenses for 4x5 advice!

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graywolf

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The thing I never get is how people come up with 3x as a comparison factor to 35mm. I get 4x. That makes...

A 90 about the equivalent of a 22mm lens on 35mm
A 100 about the equiv of a 25mm
A 135 about the equiv of a 35mm
A 150 about the equiv of a 38mm
A 165 about the equiv of a 43mm
A 200 about the equiv of a 50mm
A 250 about the equiv of a 63mm
A 300 about the equiv of a 75mm
A 400 about the equiv of a 100mm

The kit I always favored was a 90 + 150 + 250 as those are in a 60% ratio to each other. A 420 would continue the ratio, I guess a 400 would be close enough.
Another good combination is a 90 + 135 + 200 + 300 those are about 67% to each other.

For a press, techinical, or field camera I would select older lenses that are lighter and more compact.

For a mono-rail I would select lenses with wider coverage.

Although, in my own case, I would probably go with the same lenses for the press camera, with an adapter board to use them on my Toyo, as I now have both those cameras. However, I have gotten by with just the 135mm on the Graphic for years and years. In 35mm my most used lens was a 35mm, with a 100mm second. On a 4x5 that would be a 135mm and a 400mm telephoto as the Graphic would not focus a straight 400mm lens.

I used to think fast lenses were important, but my base exsposure on 4x5 is f/22 at 1/50th of a second these days. That combination works in sunlight, with a #5 flashbulb, and a 200w/s strobe.

There you have my base thinking about 4x5 lenses. My actual experience has been with the 135 Optar on the Graphic, and in the past a 90mm Angulon & 15mm Xenar on a Super Technika. I will be using the Optar on the Toyo 45G for the time being as well.
 

PKM-25

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The thing I never get is how people come up with 3x as a comparison factor to 35mm. I get 4x. That makes...

A 90 about the equivalent of a 22mm lens on 35mm
A 100 about the equiv of a 25mm
A 135 about the equiv of a 35mm
A 150 about the equiv of a 38mm
A 165 about the equiv of a 43mm
A 200 about the equiv of a 50mm
A 250 about the equiv of a 63mm
A 300 about the equiv of a 75mm
A 400 about the equiv of a 100mm

The kit I always favored was a 90 + 150 + 250 as those are in a 60% ratio to each other. A 420 would continue the ratio, I guess a 400 would be close enough.
Another good combination is a 90 + 135 + 200 + 300 those are about 67% to each other.

When I was just starting to set up my kit, I went with the 3x and in actual use, comparing to a DSLR set in 4x5 crop mode find the 4X method above to be exactly right which is great because my 90mm is a fair bit wider than I thought it would be so I can avoid the need for bag bellows and center grad filters.

My current kit is 90 + 135 + 180, soon to add a 240mm F/9.0. I thought about a 300mm but they are well, kind of huge where as the Fuji 240 in Copal-0 is nice and small, something I love about my 135mm 5.6 Apo Sironar.
 
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Old-N-Feeble

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153/42.5 = 3.6

Not 3... not 4... but 3.6.
:wink:
 

graywolf

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153/42.5 = 3.6

Not 3... not 4... but 3.6.
:wink:

What are you comparing there? I base my 4x from the narrow side of the film being 96mm vs. 24mm. That is the critical dimension if your output is going to be an 8x10 print. If you were going to do 4x6 prints (I only consider those to be 35mm proofs anyway, why would you want to crop your 4x5 images to that? I might crop them to 2in x 5 in or something like that.) the ratio would be something different, 122mm vs. 36mm (3.4x). Comparing the diagonals has no aesthetic value at all, as it only has to do with lens movements.
 

Old-N-Feeble

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What are you comparing there? I base my 4x from the narrow side of the film being 96mm vs. 24mm. That is the critical dimension if your output is going to be an 8x10 print. If you were going to do 4x6 prints (I only consider those to be 35mm proofs anyway, why would you want to crop your 4x5 images to that? I might crop them to 2in x 5 in or something like that.) the ratio would be something different, 122mm vs. 36mm (3.4x). Comparing the diagonals has no aesthetic value at all, as it only has to do with lens movements.

Only the diagonal of the two formats.

4x5 = 95x120mm = 153mm diagonal.

135 = 24x36mm = 42.5mm diagonal.

If cropping to 8x10 then 135 would be 24x30mm with a 38.4mm diagonal... damned near 4x compared to 4x5. So,. if cropping that much then, yes, 4x is appropriate. However, I truly dislike square-ish images most of the time so I'd be better off cropping 4x5 down to 2:3 ratio like 135. That would make a "normal" FL on cropped 4x5 (80x120mm) 144mm so the ratio compared with 135 format is more like 3.4. So, yeah... mathematically we agree. :wink:

ETA: I think we only disagree on cropping to preferred ratios.
 
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graywolf

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I might add that a 65mm compares to a 16mm, and a 75mm compares to a 19mm. PKM-25 is exactly right, you really do not realize just how wide LF lenses are if you use something like 3x to compare them. Wide angle has never been a major problem with LF, unlike sLR's that require a retrofocus design to go much shorter than 35mm.

On the long end is where you get into problems with LF as lenses quickly become bulky and very heavy.
 
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