Unlike camera lenses, where choice of focal lengths is substantial for any given negative size, you're quite limited in the darkroom. You can go longer, but hardly shorter on focal lengths for a given negative. I don't know of any enlarging lenses for 4x5 below 135 (although I would not be surprised if there are some with satisfactory coverage), which as stated already is going to give you the largest print size for same elevation.
There is a Rodagon WA 120mm wide angle lens for 4x5.
There may be other wide angle lenses out there, but I do not know of them.
The WA lens will give you a bigger image for a given enlarger height.
So 120 biggest image, followed by 135, then 150 with smallest image.
But the cost of the WA lens is much more than the standard 135 or 150.
In my case, I have a 135mm lens for my Omega D5, rather than the 150mm lens.
This is because the D5 has the shorter standard height column, vs the D5-XL with the taller column.
Yes I did mean the other way around 150mm gives significantly smaller enlargements than a 135mm at the same height.
Originally Posted by polyglot
Last edited by Ian Grant; 04-16-2013 at 04:03 AM. Click to view previous post history.
Reason: lack of sleep
Not your day, Ian? Sorry, see you edited before I posted. Lack of sleep? Blame APUG.
Originally Posted by Ian Grant
The gain from 135 to 120 will be 12,5 %. So on linear dimension, it should enable one to change a 16" x 20" image to 18" by 22,5", for example. From 150 to 135, the change is slightly less, but it may be such that one can fit in a paper one size larger that isn't possible with the longer lens. If you use WA lenses, make sure that your bellows assembly contracts short enough to attain focus at all column settings. I cannot for instance use a 40 mm lens for 35 mm on my Durst M605. Although I have no idea, it may be possible that some 4x5 enlargers do not allow for such short lenses to be used, unless they were designed for all image sizes down to 35 mm, or at least one or two formats down.
Last edited by dorff; 04-16-2013 at 04:26 AM. Click to view previous post history.
Durst do recessed lens boards, the two I have to hand, one measures 15mm deep, the other, 35mm deep. The downside with recessed boards is being able to adjust the aperture and/or see the scale.
Originally Posted by dorff
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I think due to the requirement of flat field, very high in sharpness and especially distortion free it would be very difficult to make a wide angle enlarging lens.
Originally Posted by superd
That is why the WA enlarging lenses cost so much more.
Originally Posted by Chan Tran
And that is why I bought the 135 rather than the more expensive 120mm lens.
Do they still make 5x4 film?
5x4 film sounds like a larger format than 4x5 I guess it depends if you shoot landscape or portrait.
Originally Posted by Ian Grant
"Photography, like surfing, is an infinite process, a constantly evolving exploration of life."
Thank you so much for the help, looks like the 135 for me, not sure I could stretch to the 120WA,
Hope to post a few image from the 5x4 soon,
A painter interprets an image, a film photographer captures an image and a digital photographer creates an image.
I removed the column from my 6x7 enlarger and mounted it to a sturdy plywood cube, which has a wider base than the top and sides. The base has 1/4" holes on each side, and the edge of my worktable has 1/4-20 threaded nuts in the surface (T-nuts). When I want to print big, I mount the cube to the edge of the table using 1/4-20 thumb screws and put my easel on the floor. For normal printing, there's a set of holes at the back of the table.
A cool thing about this setup is that it's easy to fine-tune the level of the enlarger; I can loosen one corner and slide a shim beneath it and re-tighten. Works like a champ.