I would suggest a different approach. Mount the lens on a full frame camera, force it to FF mode, and actually take a picture. Then, given that K-1 has extremely good sensor and that this is going to be an experiment anyway, use editing software to lighten up the dark corners. Then, I think it would become evident if this whole exercise is worthwhile.
I would hazard a guess, that even if the lens is molested by removing whatever seems to be on the way of full frame coverage and ultra-wide angle, it would actually turn out that the image quality in these corners is such that this whole thing is really not worth it. Rather keep the excellent super-wide lens *designed* for APS-C sensor and use it for whatever it was actually designed. Let's see - 8mm at wide end, this gives an angle similar to that of 12mm lens on FF camera. This is immensely wide. On Sun, Feb 26, 2017 at 8:58 PM, Larry Colen <[email protected]> wrote: > It's permanently attached. He could try talking some photos highlighting > portions of the good with a laser pointer. > > > On February 26, 2017 10:04:21 AM PST, Bipin Gupta <[email protected]> wrote: >>STOP! Do not cut the Lens Hood out first. Note, it has a flower petal >>type hood with the longer petal on the top & bottom. >>It's these longer ones that causes the vignetting. >>Try twisting it to the LH / RH position from the top. Take shots and >>see the results. >> >>If it won't budge (after you have tried both the CCW & CW twist), mark >>the top & bottom petals to follow the petal shape. Now use the smaller >>1/4 inch hack saw blade without the handle. >>Check the photo. Go on cutting by trial and error. >>Make sure you don't graze the lens. Stick a 3M Post It on the Lens as >>protection. >>Then use emery paper to smoothen the rough cut surface. >> >>If the LH / RH vertical petals are the culprit too, mark and cut with >>the hack saw. >> >>Good Luck. >>Bipin >> >>There is nothing worse than a sharp image of a fuzzy concept - Ansel >>Adams > > -- > Sent from my Android phone with K-9 Mail. Please excuse any swypos. > http://red4est.com/lrc > > -- > 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. -- Boris -- 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.
