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Thread started 27 Apr 2013 (Saturday) 06:46
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Correct 17-40 pyramid effect in LR or PS?

 
Roxie2401
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Apr 27, 2013 06:46 |  #1

Is there a way to correct the slight inverted pyramid effect caused by a 17-40 when taking interior room shots in Lightroom or do I have to go to PhotoShop to do this? I have found the lens profile correction but are there other tools in LR to use?

What I am seeing is a slight outward shift from floor to ceiling on side walls and need to straighten these walls.

Thanks




  
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gjl711
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Apr 27, 2013 06:48 |  #2

I dont believe that LR will do this correction. You can avoid it in the first place by making sure that the camera is parallel to the ground when you take the picture and not pointed up or down.


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Roxie2401
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Apr 27, 2013 06:50 as a reply to  @ gjl711's post |  #3

Do you know that tool(s) to use in PhotoShop, if not in LR? Thanks




  
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sapearl
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Apr 27, 2013 06:55 |  #4

In Photoshop it is: FILTER -> LENS CORRECTION -> CUSTOM -> and then Transform VERTICAL PERSPECTIVE. I also use the 17-40 and you just have to be careful as JJ suggests and initially make sure the camera is parallel to the ground.


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gjl711
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Apr 27, 2013 06:57 |  #5

Roxie2401 wrote in post #15872170 (external link)
Do you know that tool(s) to use in PhotoShop, if not in LR? Thanks

In PS it's under the Filter then Lens Correction. When the image pops up, click on the "custom" tab on the right. Then under the custom adjustments, the one your looking for is the "vertical perspective". Turn on the grid, adjust until the lines are looking right then crop to fit.


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Roxie2401
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Apr 27, 2013 07:03 as a reply to  @ gjl711's post |  #6

Interesting - in LR there is also a vertical and horizontal perspective correction in the Lens Correction Perspective that presents grid lines.

Is cropping required after correction in PS?




  
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sapearl
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Apr 27, 2013 07:05 |  #7

Roxie2401 wrote in post #15872191 (external link)
Interesting - in LR there is also a vertical and horizontal perspective correction in the Lens Correction Perspective that presents grid lines.

Is cropping required after correction in PS?

I can't speak for LR, but not for PS at this menu unless you wish.


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Roxie2401
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Apr 27, 2013 07:55 as a reply to  @ sapearl's post |  #8

This is a big help - I thought I would have to use the "Skew" tools.




  
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Rimmer
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Apr 27, 2013 08:23 |  #9

Lightroom: Develop > Lens Correction > Manual > Transform > Vertical. Check the Constrain Crop box.


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tzalman
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Apr 27, 2013 08:54 |  #10

LR4 does it if you don't want to break the non-destructive workflow, but it's easier in other applications. LR5 will do an automatic correction that may need a little manual tweaking.


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Correct 17-40 pyramid effect in LR or PS?
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