Any thoughts on using a Schneider Kreuznach Comparnar 105/f4.5 as a taking lens on a 4x5 speed graphic? Has anyone tried this? Would it cover 4x5? Plan to shoot black and white only. Any inputs greatly appreciated.
Can't say for that Componar, but I have a 150mm f/5.6 Componon that's beautiful, and as a bonus, I can take the front group off an it's a 250mm f/11. I also have a 10.5 cm f/4.5 Agnar triplet (off a 6x9 folder) that just about covers 4x5 -- if I stop down to f/16 or smaller and focus in to 12 feet or so, it covers and is hyperfocal. Seems likely that Componar isn't any worse than the Componon, and any 105mm in that class should have at least the same coverage as my Agnar.
Therefore, I'm going to vote for "likely to work, give it a try."
Any thoughts on using a Schneider Kreuznach Comparnar 105/f4.5 as a taking lens on a 4x5 speed graphic? Has anyone tried this? Would it cover 4x5? Plan to shoot black and white only. Any inputs greatly appreciated.
But a 105mm regular enlarger lens has a too small coverage angle to cover 4x5 at infinite focus, as you go macro you give bellows extension to focus and the same coverage angle delivers a larger image circle (than with infinite focus).
You’ve never printed with a 120WA have you. Fall off is not worse. Performance is extremely high and, with a properly ialingned enlarger with a glass carrier at least equal to the best, non Apo, 150 and 135mm enlarging lenses!It won't cover well 4x5, if corners are illuminated they won't have quality. You may experiment with it, sure interesting shots can be taken, but in general it won't be suitable. A way to use that lens for 4x5" is reversed for extreme macro.
A 150mm regular enlarger lens will cover 4x5.
A 120mm enlarger lens has to be special "W" Wide kind to cover 4x5, delivering higher fall-off than a 150mm.
But a 105mm regular enlarger lens has a too small coverage angle to cover 4x5 at infinite focus, as you go macro you give bellows extension to focus and the same coverage angle delivers a larger image circle (than with infinite focus).
May be the componar is optimized to yield peak performace around x4, so reversed for say 1:4 extreme macro (image x4 times larger than the object !) it should shine (to shot coins, insects...).
You’ve never printed with a 120WA have you. Fall off is not worse. Performance is extremely high and, with a properly ialingned enlarger with a glass carrier at least equal to the best, non Apo, 150 and 135mm enlarging lenses!
A large format macro lens, interesting...
Thanks for all the replies.
Go print with a WA and then make your comments. Try the 120 Rodagon WA.Bob, this deserves a clarification... the 120mm WA fall-off is not worse than the regular 120mm for say 6x9cm, ....but the 120 WA also covers 4x5" and its fall-off for 4x5" is worse than the fall-off of a 150mm, no surprise, the cos^4 law explains it. (This is not a tilting pupil design... so cos^4 is in force).
I've never printed with an WA, but I made a (laser cut) lensboad for a Componon 105mm W. A. of a friend, and while having it I mounted it in a 138S and I explored the field with a lux meter, anyway datasheet shows the fall-off, there is no doubt that a 4x5" (same big print specially) the 120 W.A. has well higher fall-off than a 150 for 4x5", specially when relatively open. With small enlargements (say x3) then bellows extension is larger and we work more with the center or the image circle... and less difference will be seen.
120 Rodagon WA.
Get one and make prints with it. Then write.Bob, this is the Rodagon W.A. 120mm fall-off, well stopped it follows the cos4 rule, no surprise.
By f/8 in a 4x5 negative ( x6 enlargement) it has slightly more that one stop in the corner point, and by f/11 it matches yet the cos^4 rule, delivering 4/5 of an stop fall-off in the corner point.
...this is a well noticeable fall-off. I would use a 120mm W.A. (Componon or Rodagon) to compensate the fall-off of the taking lens that thins the negative in the corners, so less illumination in the corner helps to sibtitute some dodging.
Looking the same graph for the 150mm it delivers 3/5 of stop in the corner point but we have 1/2 stop at around 8mm from the corner. If our enlarger has room enough, a 180mm works better than a 150mm and the 120 w.a. , regarding fall-off, still we may want some fall-off from the enlarger's lens to compensate the taking lens fall-off, of course !!
What is clear is that cos4 rules by f/11 in those lenses.
View attachment 265112
https://nielspn.dk/files/rodagon rodagon-wa.pdf
That lens will work on your camera. It will likely cover 6x9cm format at infinity and 4x5" format at 1 meter and closer.Any thoughts on using a Schneider Kreuznach Comparnar 105/f4.5 as a taking lens on a 4x5 speed graphic? Has anyone tried this? Would it cover 4x5? Plan to shoot black and white only. Any inputs greatly appreciated.
Bob,Get one and make prints with it. Then write.
Get one and make prints with it. Then write.
If you take the time to test rather then read you will find that the 120 Rodagon WA outperforms both the....150
Just go print with one.
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