Dear all,
On a Credo 40, which lens would you recommend for going wide for a single shot with movements? (Landscape, not architecture. Filter use is a must)
I like the perspective of my 35mm Mamiya lens, so the Schneider 35 XL is one I have in mind, but something wider would be nice too. Out of the 28mm lenses, which do you think works nicer with my back? The Schneider or the Rodenstock?
The Schneider 24mm is a lens that I was looking at too, but it seems like it can offer next to no movements and also, is discontinued. Any point in pursuing this lens?
Any help is much appreciated .
P.S. Most probably, my platform of choice would be the RM3Di.
the SK24 has a very small image circle so it was not good for movements anyway. With the SK28 you will get limited movements due to it's symmetric design (you get crosstalk and desaturation), if you don't shift much it will be fine anyway. In fact it might be a better choice than the Rodenstock 28 as the Rodie has only 70mm image circle which is hard-limited. There's a good Rodie vs SK 28 test on this forum.
Rodenstock has got some criticism for their sharp hard-limits on their image circles, if you have a sky in the top of the image (common) you don't really need the utmost sharpness there. One problem with the hard limit disc is that you can get a reflection from it too which may give a visible penumbra that require some cleanup in post-processing if you have a really clear blue sky. I've noted that this phenomenom can happen also when you have center filters (which you generally have on ultra-wides) as that gives a sharper end to the image circle. A good idea is simply to have a large enough image circle so you don't need to move to the edge most of the time. The 70mm of the Digaron-S series might feel a bit tight even with the 44x33mm sensor. The Digaron-W (and SK wides) has 90mm and that is plenty for a 44x33mm sensor.
The SK35 will be somewhat limited by crosstalk too on this sensor, but less so than the 28. If you want to find examples of real-world results you don't need to search for a Credo 40 specifically, anything with the 6um Dalsa technology will do (IQ160, IQ140, P65+, P40+, Aptus-II 8, Aptus-II 10 etc) will do, if you compare with a full-frame sensor you need to compensate for that of course and crop away a bit. As the Credo 40 is only 44x33mm you will feel less limited than you would do with a full-frame sensor as you can shift it more relative to the sensor size.
All the Rodenstock Digarons work well with your sensor and if you want a combination that is "designed for" your sensor Digarons it is. With the SK wides and shifting it's about pushing past the design limits of the sensor and evaluate if you think the real-world results are good enough, which is a very subjective decision. You will of course always need to apply LCC, and if you happen to do high contrast post-processing work like Peter M you might run into the tiling even with the Digarons which also a known issue with this sensor type. Tech wides are simply demanding for the sensors, but the results you get is fantastic.
"My dealer" Linhof Studio stopped selling the SK28 because of its limitations with the Dalsa 6um sensors, but there are still users that use them, Dan Lindberg on this forum use it with his Credo 60, you could possibly ask him about shooting techniques. I would guess not shifting too much is the key.
The most impressive lens of the really wide angles is of course the Rodenstock Digaron-W 32mm. While you may need to consider some compromises when you go down to 28mm and shorter, the 32mm is the widest "no compromise" lens. Oh well, if you have the mindset of an old-school large format architecture photographer you won't like that it's retrofocus and have a little distortion and would prefer the SK35 anyway, but few worry about distortion these days and it's not exactly large.