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Lens correction in PS 2018
Feb 10, 2018 09:33:51   #
pesfls Loc: Oregon, USA
 
Is there a method in Photoshop 2018 to provide more correction to wide angle lens distortion than just going through the steps to enter enter your camera and lens data? ie: straighten a wall in a building that is leaning in an image.
Thanks.

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Feb 10, 2018 11:48:26   #
rgrenaderphoto Loc: Hollywood, CA
 
pesfls wrote:
Is there a method in Photoshop 2018 to provide more correction to wide angle lens distortion than just going through the steps to enter enter your camera and lens data? ie: straighten a wall in a building that is leaning in an image.
Thanks.


Lens correction is a part of Lightroom Classic CC, and Adobe Camera Raw (which I never use). In Lightroom's Develop Module Transform panel (see screen shot), you can click on the various auto transform buttons, or select a vertical and horizontal line in the image for automatic transformation. It isn't perfect, and if the super wide angle distortion is too extreme, it will not rescue your images.

House 1 is as shot, with a D810 and Sigma 15 mm f/2.8 fisheye. No corrections applied.
House 2 is with the Enable Lens Correction box checked
House 3 is with the Full Button selected in the transform panel and some tweaks to the vertical, horizontal, rotate and Aspect sliders.

i know there is similar capabilites in Photoshop's crop module, but I do not use PS for that type of processing.

Good luck, and have fun.

No other exposure corrections were applied. The images are far from perfect, but the examples illustrate just what you can do.



House 1
House 1...

House 2
House 2...

House 3
House 3...

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Feb 10, 2018 12:06:02   #
pesfls Loc: Oregon, USA
 
Thank you very kindly. I have always enjoyed your willingness to be helpful. I will give it a go.............Holy cow, the transform function works just as I hoped. That's the ticket I needed. The right front wall was leaning left too much as I was fairly close with a 24mm. I went as far as I could in transform mode without wrecking the bottom corners. It'll do. The pines to the left are naturally leaning from the prevailing wind so not to worry there. A bit more to do on it but this solves what to me was the most offending aspect. Again, I appreciate it.


(Download)

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Feb 10, 2018 16:50:55   #
Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
 
pesfls wrote:
Is there a method in Photoshop 2018 to provide more correction to wide angle lens distortion than just going through the steps to enter enter your camera and lens data? ie: straighten a wall in a building that is leaning in an image.
Thanks.


There is also a filter called Adaptive Wide angle, which will correct for barrel/pincushion distortion. You place an anchor point on the image along a line that "should" be straight, then touch the other end of that line, and PS will straighten out the line for you.

A wall leaning is a different kind of issue. If I understand your question correctly, what you are seeing is called "keystoning" and it is common when you tilt the camera up to get the top of a building or a wall inside a tall ceiling, like a church - the verticals will appear to converge. You can fix that in PS using the Perspective Warp or the other tools in the Edit menu.

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Feb 10, 2018 19:03:18   #
pesfls Loc: Oregon, USA
 
Gene51 wrote:
There is also a filter called Adaptive Wide angle, which will correct for barrel/pincushion distortion. You place an anchor point on the image along a line that "should" be straight, then touch the other end of that line, and PS will straighten out the line for you.

A wall leaning is a different kind of issue. If I understand your question correctly, what you are seeing is called "keystoning" and it is common when you tilt the camera up to get the top of a building or a wall inside a tall ceiling, like a church - the verticals will appear to converge. You can fix that in PS using the Perspective Warp or the other tools in the Edit menu.
There is also a filter called Adaptive Wide angle,... (show quote)


Thank you Gene51. Yes I did tilt the camera because I wanted to catch some of the passing, wispy clouds. I will fiddle with Perspective Warp until I understand how it behaves. I am less than a year on my own trying to PP with a computer so I’m very much a novice at it but gradually making some progress. I appreciate your help.

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