Great to see you here. Join our insightful photographic forum today and start tapping into a huge wealth of photographic knowledge. Completing our simple registration process will allow you to gain access to exclusive content, add your own topics and posts, share your work and connect with other members through your own private inbox! And don’t forget to say hi!
125mm. I've done stitches of 2 vertical frames with it with minimal overlap and very good results that require almost no LCC with the 80MP. The lens was designed for use with scanning backs that have effective sensor size of 72×96 mm. It has a 36mm/ 32mm movement range:How big is the image circle on the 90HR-W? On the SK90 it is 90mm. I like the lens on my P40+. I haven't gotten my new back yet but hopefully soon I can test out my 90 on it.
We're shifting for two reasons: increase file size with "planar" stitching and perspective control. Does a 10% shift threshold mean 5mm? Does 15% equal 7.5mm? With a 40x54 mm back shooting in portrait orientation and shifting to achieve a landscape oriented image it takes 15mm of shift either direction to achieve a 3x4 aspect ratio; 12mm of shift to achieve a 8x10 aspect ratio. 5mm of shift doesn't even make a square frame.I may not be able to prove it wrong, but I can assure you it is moot -- : If you shift to where you need 3 stops of LCC correction, then you are well BEYOND the lens' ability to resolve well enough to meet your original A+ IQ standard in the first place...
From what I've seen, Cunin's 10% shift threshold is at least 80% achievable D); however at 15% one needs to test and see based on their own needs and criteria.
The focus plane issue wasn't important with this lens at this distance, but clearly becomes important as you get closer. Doing the keystone correction s C1 is a real benefit because it is done in a single pass with the other C1 edits. By the way 20 more megs of pixels and a lower base ISO and more DR would improve the tilted variant above.Much of it of course depends on the final desired framing. If you leave a lot of cropping room and require only modest keystoning then a small amount of tilt can be enough. In some situations however the tilt will alter the focus plane so you will have to re-focus or stop down for DOF.
The horizontal lines you are seeing in the shifted image crop can be corrected in C1 if it's a Phase or a Leaf raw file.
By 10% I meant 10% of the total IC -- so if a lens has a 100mm IC, you can probably safely shift 10mm in any direction with little resolution loss and limited light falloff. As you get further out, resolution falloff AND light falloff AND distortions AND curvature of field all go downhill geometrically, so massive shifts can become problematic for some images. However, I maintain that it is very often not crucial to the image integrity that corners be "perfect", so this gives significantly more shift freedom for artistic purposes, at least IMHO... On the other side of this coin is with 80MP available in a single cpature, and even more if we stitch, it is probably advisable when in doubt, to shoot a little loose and crop.We're shifting for two reasons: increase file size with "planar" stitching and perspective control. Does a 10% shift threshold mean 5mm? Does 15% equal 7.5mm? With a 40x54 mm back shooting in portrait orientation and shifting to achieve a landscape oriented image it takes 15mm of shift either direction to achieve a 3x4 aspect ratio; 12mm of shift to achieve a 8x10 aspect ratio. 5mm of shift doesn't even make a square frame.
No, at least not as far as I'm concerned! One of the main reasons I like the Acra RM design is the fact that both Rise/Fall and Shift movements are on the REAR standard so planar stitching, and even multi-row planar capture is a breeze. Then combined with the way it imparts tilt (or swing) I can do a horizontal planar capture WITH TILTS enabled, or a Vertical planar stitch with swing enabled. Obviously we cannot cross tilt/swing and shift/rise axis when doing a planar capture.Should we be dropping planar stitching as an objective?
John, that is a big advantage of the Cambo system -- tilts AND swings together on the lens for total control over the PoF. The downside is it's design requires more room so only lenses with longer flange-focal lengths can be mounted for TS. With the Arca, you can theoretically tilt (or swing) even the 23mm lens, but you cannot tilt and swing together with any lens.similar with the cambo (shifts on the back), but you get both T and S on the lens.
Interesting - a number of the mid-wide Schneiders might be quite usable at 12mm - planar stitch for a nice 4x5 aspect ratio. For multi row you'll obviously be going to longer focal lengths.By 10% I meant 10% of the total IC -- so if a lens has a 100mm IC, you can probably safely shift 10mm in any direction with little resolution loss and limited light falloff. As you get further out, resolution falloff AND light falloff AND distortions AND curvature of field all go downhill geometrically, so massive shifts can become problematic for some images. However, I maintain that it is very often not crucial to the image integrity that corners be "perfect", so this gives significantly more shift freedom for artistic purposes, at least IMHO... On the other side of this coin is with 80MP available in a single cpature, and even more if we stitch, it is probably advisable when in doubt, to shoot a little loose and crop.
No, at least not as far as I'm concerned! One of the main reasons I like the Acra RM design is the fact that both Rise/Fall and Shift movements are on the REAR standard so planar stitching, and even multi-row planar capture is a breeze. Then combined with the way it imparts tilt (or swing) I can do a horizontal planar capture WITH TILTS enabled, or a Vertical planar stitch with swing enabled. Obviously we cannot cross tilt/swing and shift/rise axis when doing a planar capture.
Yes. One of the issues with the Hasselblad back.Is there subtle horizontal banding around the "shifted cross" mag view?
Please keep in mind that my 10% is a general guide only, so it may vary significantly between lenses and is not offered as anything other than a rough guideline to set expectations.Interesting - a number of the mid-wide Schneiders might be quite usable at 12mm - planar stitch for a nice 4x5 aspect ratio. For multi row you'll obviously be going to longer focal lengths.
I'd love to see how the Schneider 72 works out - with a 90mm image circle 12mm of shift would be pressing it a bit under your formula.
I was aware of that, but that doodad compromises the net portability of the package a bit, doesn't it? The real killer for me on Alpa was the tilts being limited to longer lenses only.By the way with the Max all rises and shifts are done with the back if you buy the doodad that attaches the front standard to the tripod. Tilts are limited to focal lengths of 80mm and longer and can be done in the front or the back, depending on where you put the tilt adapter.
My thinking as wellWhen i was shooting the blad 40mm was used more than my 28
So i got the 43 for the cambo; that and i will be going full frame, figure i can shift or pano for really wide
Horses for courses
Jack, actually the stitching adapter foot doesn't really affect the portability of the Max much at all. Once you've figured on having a big plate camera body the front mounted foot doesn't really make a lot of difference overall in my experience. If necessary you can also store the body in the bag with the front rise set to it's highest position which minimizes the additional space taken by the foot. Now if we were talking about portability with the viewfinder attached then it's a different matter.... that doodad compromises the net portability of the package a bit, doesn't it? The real killer for me on Alpa was the tilts being limited to longer lenses only.