For ultimate image quality, thus also correct perspective one need to do flat stitching.Anders,
Could you please point at evidences supporting your statement above? They are not backed up by either experience or mathematical theory.
Thank you.
Cheers,
Bernard
Bernard...
Much data is lost in rectilinear stitching, as the distorted images have to be cropped back to rectangles, but you can compensate for this by using more images.
(In pano-cylinder-stitching using long lenses, there may be little or no distortion or loss of data.)
No DSLR or other camera with an anti-aliasing filter approaches the "per pixel" quality of any medium format digital back, let alone the best modern ones, but, you could use your technique with a top quality camera.
I know your technique works, and you have photos to prove it, but for ultimate image quality, and correct perspective, one needs to flat stitch with a MFDB and a quality lens.
This is because the stitching software has to distort and re-sample the image, and this can only degrade the image, causing loss of resolution.I am aware that the better stitching programs do a good job, and the loss of resolution is minimal, and would be difficult to see or quantify in a high-res image.
I think that even the best £5,000 ultra-wide angles are not distortion-free, and if you have to correct distortion in post-production, then you are re-sampling the image, and this would result in the same type of loss of resolution that you get with pano software, so, in extreme circumstances, a rectilinear pano can produce results comparable with what can be achieved with a less than ideal ultra-wide angle lens. (and I have to admit that i do not think they ever have produced an ideal ultra-wide, and never will.)
One problem is that there are AFAIK, there are no digital long lenses for Medium format digital view cameras, but the Schneider Fine Art Gold lenses might be useful as they have enough image circle for many Giga-pixels, so you could overcome any lack of lp/mm by down rezzing.
If you can produce a pano from 9 pictures taken with a 100mm lens that is equivalent to a single shot taken with the same camera with a 24mm lens, then the only benefit is that you could do without the 24mm lens, for subjects that do not move, in circumstances where you have the time to set up your kit and take 9 pictures!
I appreciate that cylinder / spherical stitching is different, and would, for me, be the technique of choice for panoramas of curved subjects.