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Correcting converging verticals/keystoning on APS-C with DIY bellows tilt-shift?

Started May 5, 2017 | Discussions thread
Bernard Delley Senior Member • Posts: 2,041
Re: Correcting converging verticals/keystoning on APS-C with DIY bellows tilt-shift?
1

Alfred11 wrote:

Hi, I've got a wide angle lens that gives me consistent good results, however as soon as I have to tilt the camerea, keystoning troubles me.

Nothing exaggerated, of course can be corrected in post processing, however since I can literally take hours for some still outdoor subjects (tripod, manual focus, test shots, bracketing and what not) until I either give up or am satisfied with the result, I would prefer not soften the image with the post processing keystone correction-distortion.

Do you think I'd use one of the bellows (probably available for macro) widely sold, modify it for a lateral degree of freedom, attach the lens on one end (and use all manual controls since there are no electrical contacts), and then tilt-shift it enough to prevent keystoning? Or would this yield even worse results (softer images, distortion, loss of sharpness) than post-processing?

Thank you

Alfred

do not forget the quick method using an ultra wide lens:  You use vertical image orientation and keep the lens axis level. So verticals stay parallel verticals (unless the lens has noticeable barrel distortion, which may need to be corrected too). Possibly you will discard some of the lower half of the image.

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