Need advice on ULF bellows
Hello.
I am newbie and planning an ULF 16x20, with the lens Goertz red dot 24in lens.
How long should the bellows be for the lens in that camera? I want to know the min and max(if there is) length of the bellows.
Maybe I will want to use the camera for landscape with other lens, but I plan to use it for portrait.
Thanks in advance.
Jongin
Re: Need advice on ULF bellows
At least double the lens focal length
In 6 hours more advice will show up
Depends if head only, head and shoulders, or full body
Good luck!
Re: Need advice on ULF bellows
Thank you, Tin!
Do you mean if I choose wider lens, say, 14in, the bellows needs to be longer than 28 inch?
And for 24in lens, it should be at least 48inch long?
Re: Need advice on ULF bellows
You need to study a bit
Here is a free page on a pay for knowledge website.
How I Calculate Bellows Factors & Magnification Ratios For Large Format
There other free websites, but this was the first I found.
Re: Need advice on ULF bellows
Quote:
Originally Posted by
Tin Can
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Thank you so much Tin!
Re: Need advice on ULF bellows
You will need to do some research, but there may remain some things you might not get from research.
Your research will tell you with a 24" non-telephoto lens and 48" off bellows you will be able to get image size of 1:1 (life size). What research is unlikely to tell you is depending upon what you are going to use a 16x20 camera for, that might may or may not be appropriate...
Similarly,you are not likely to find in your research of the potential issue of not being able to focus some wide angle lenses at infinity because you cannot compress the bellows enough....
Good luck in your efforts,
Len
Re: Need advice on ULF bellows
Len, what wide angle lens are you thinking of?
Usually we want a 'normal' lens that has a focal length matching the format diagonal.
OP stipulated a lens that meets that
Of course there are exceptions
OP consider this thread https://www.photrio.com/forum/thread...verage.138825/
Quote:
Originally Posted by
Len Middleton
You will need to do some research, but there may remain some things you might not get from research.
Your research will tell you with a 24" non-telephoto lens and 48" off bellows you will be able to get image size of 1:1 (life size). What research is unlikely to tell you is depending upon what you are going to use a 16x20 camera for, that might may or may not be appropriate...
Similarly,you are not likely to find in your research of the potential issue of not being able to focus some wide angle lenses at infinity because you cannot compress the bellows enough....
Good luck in your efforts,
Len
Re: Need advice on ULF bellows
Randy,
In post #3 above, he did ask a question about a 14" WA lens. The common ULF 14" WA lens I can think of is the 355 G-Claron.
I know on my 8x10 field camera with 32" bellows length that I know I have to put the camera into major contortions to focus a 165 Angulon at infinity, in part due to bellows compression and also due to the closest distance between the front and rear standard that they can come together. I can do it, but was not the way I originally thought.
One of those things you find out about not by research, but by trying to do, aka the School of Hard Knocks. I expect we have a large number of alumni members here...
My experience on the issue, and no research performed for that knowledge, :cool:
Len
Re: Need advice on ULF bellows
Of course, but a 14" WA is far from a 165mm Angulon. I have one. I also have set of 16X16" bellows with 40" of easy extension, that folds down to under 2". Custom Bellows UK, made them. They are for a 14X16" camera using 14X17" X-Ray film holders, which don't use the entire 17" of film available normally.
Cameras vary...
By the way, 'TIN CAN COLLEGE' is The School of Hard Knocks and everyone is an alumnus.
Now it's up to the OP
Happy Holidays everyone!
Quote:
Originally Posted by
Len Middleton
Randy,
In post #3 above, he did ask a question about a 14" WA lens. The common ULF 14" WA lens I can think of is the 355 G-Claron.
I know on my 8x10 field camera with 32" bellows length that I know I have to put the camera into major contortions to focus a 165 Angulon at infinity, in part due to bellows compression and also due to the closest distance between the front and rear standard that they can come together. I can do it, but was not the way I originally thought.
One of those things you find out about not by research, but by trying to do, aka the School of Hard Knocks. I expect we have a large number of alumni members here...
My experience on the issue, and no research performed for that knowledge, :cool:
Len
Re: Need advice on ULF bellows
I have a Richard Ritter 16x20 camera and could barely focus a Nikon NIKKOR-W 360mm f6.5 lens at roughly 8 feet (I was photographing a Sycamore tree in tight quarters). The bellows barely compressed enough for me to focus the lens. And the lens vignetted on the negative.
I have not tried my 355mm G-CLARON on the 16x20 , but I am skeptical it will focus at infinity...
Daniel