For those of you who have a camera with a short bellows.. what do you do for a long lens?
Do you use an extention lens board?
Do you use a telephoto lens?
Do you use something else entirely?
I'd like to hear your thoughts.
For those of you who have a camera with a short bellows.. what do you do for a long lens?
Do you use an extention lens board?
Do you use a telephoto lens?
Do you use something else entirely?
I'd like to hear what people actually have experience with, as opposed to what they have read about.
THANKS
Shawn: wow, I did not know there was usch a diffrence. I will definately look into that. THX
Do you use something else entirely?
If you cannot really get infinity focus on the base camera your options are limited.
You're welcome. =)
Here is a great resource for modern lenses:
Dead Link Removed
Scroll down the chart under glossary of terms.
"The flange focal distance of a lens is the distance from the rear surface of the lens shutter (i.e. the front surface of the lensboard) to the focal plane (i.e. the film plane) when the lens is focused at infinity."
I always assumed the flange focal distance was pretty close to the indicated focal length, exept of course for telephotos.
Are you sure?
I ask because I sometimes use a 10.16"/9 Cooke Copying Lens on my 2x3 Century Graphic, maximum extension around 196 mm. The trick is to hang the lens on an LTM tube on an adapter on a #1 shutter on the board. Focuses usefully close, too.
Oh, yeah, the lens is TTH's interpretation of the Apo Tessar, isn't at all telephoto.
Depends on the camera, I think. Both the Wista and the MPP are using essentially 100mm boards, so that limits the diameter of any extension tube, and thus the rear element size. 30mm or so is doable, after that the geometry gets tight, especially with movements. The Wista is not that rigid at full extension, so putting a lens in a No.1 shutter 30mm or more ahead of the lens panel introduces a lot of stress/flex. And that would just get me to 300mm. I might as well enlarge the 270mm.
What is it, about 1/10th the focal length of extension for a general focus range from infinity?
I made a top-hat lensboard for my 300mm Nikkor M on field cameras with only 12" of bellows draw. It saves me camera weight and works fairly well as long as I don't try to focus too close (min. focus is about 8 feet). Also, it is a pain to use front swings/tilts although it is doable to a certain extent (till the top-hat board starts to vignette.
As 12 inches is almost exactly 300mm, this is not much of an extension. It is just enough to make the lens usable for general work (not too close up) in the field. If you need to put a lens on your camera that is significantly longer than the bellows length and you expect to be using it regularly, I'd either spring for a telephoto if that would meet your needs (however, they are heavy, have little coverage and are a PITA with front movements) or just get a different camera altogether.
Best,
Doremus
i just bought this same lens to use on my Wista.. which only has 12" bellows draw..
im probably just going to buy an extended lens board.
i also have a Graphic View II which i think has 14" bellows draw, so the lens isn't completely unusable.
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