John Francis wrote: > On Sat, May 17, 2008 at 08:23:22PM -0700, Bob Blakely wrote: >> To do perspective correction in photoshop or any other imaging software, you >> must loose pixels, synthisize pixels or both. Shift is still the way for >> digital purists. > > That's possibly true (but watch out for those loose pixels :-) > But unless you're printing on a device with native resolution that > exactly matches your original image, you're going to end up with > lost and/or synthesized pixels, anyway.
With a perspective shift lens you're using a larger-image-circle lens and those generally (though not always) have lower resolution than standard 35mm lenses. And by using the shift capability you are, by definition, using more of the edge of the image circle, which is virtually always lower resolution than the center. This is all hypothetical, though: I've long wanted to do a side-by-side test of the 28mm shift lens compared to the 31mm Limited, correcting the perspective distortion in Photoshop for the 31 Ltd. It would be interesting to see what differences, if any, showed up in large prints. Anyone got a 28mm Shift to bring to GFM? :) > Never let the pursuit of purity stand between you and a good image. Wisdom! -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
