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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 30 Sep 2012 (Sunday) 05:48
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Wide Angle Lense Use On Groups

 
uneek78
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Sep 30, 2012 05:48 |  #1

Would using a wide angle lens lower than a 24mm be bad on people are a large group? I'd say from 1 person to 30 tops. Or how much lower can I go until I see major distortion?


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SkipD
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Sep 30, 2012 06:11 |  #2

uneek78 wrote in post #15060155 (external link)
Would using a wide angle lens lower than a 24mm be bad on people are a large group? I'd say from 1 person to 30 tops. Or how much lower can I go until I see major distortion?

I'm sure you are thinking of perspective distortion. This is not caused by focal length choice. Instead, it is caused by your choice of camera position relative to the group (and the subsequent choice of focal length to fill the frame).

Please read our "sticky" (found in the General Photography Talk forum) tutorial titled Perspective Control in Images - Focal Length or Distance?.


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frugivore
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Sep 30, 2012 07:58 |  #3

In addition to the perspective distortion that Skip mentioned, you can also run into rectilinear correction distortion which causes the outer track of the imaging circle to become 'stretched', so it's best to keep your subjects away from the sides of the frame.

Then there is barrel distortion which is a result of this correction (or lack thereof). Both of these can be adjusted with software, but perspective 'distortion' cannot be. At least I'm not aware of any software that does this.




  
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FrostMonolith
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Sep 30, 2012 09:40 |  #4

I don't think that "wide-angle-barrel-distortion" thing is mentioned either. If so, zoom the lens at a tighter focal length.


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2n10
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Sep 30, 2012 10:00 |  #5

frugivore wrote in post #15060371 (external link)
In addition to the perspective distortion that Skip mentioned, you can also run into rectilinear correction distortion which causes the outer track of the imaging circle to become 'stretched', so it's best to keep your subjects away from the sides of the frame.

Then there is barrel distortion which is a result of this correction (or lack thereof). Both of these can be adjusted with software, but perspective 'distortion' cannot be. At least I'm not aware of any software that does this.

DxO Optics Pro has some tools that could be a possibility. Haven't used them in this context though.


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Wilt
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Sep 30, 2012 16:17 |  #6

I have found, using multiple format sizes, that the diagonal AOV of 74 degrees is pretty safe for group shots without noticeable induced perspective distortion...

17mm on APS-C, 28mm on FF, 47mm on 645 are safe FL for group shots


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uneek78
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Sep 30, 2012 19:17 |  #7

Thanks all! Great info!


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Zlatko ­ Batistich
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Sep 30, 2012 19:43 |  #8

Wilt wrote in post #15061970 (external link)
I have found, using multiple format sizes, that the diagonal AOV of 74 degrees is pretty safe for group shots without noticeable induced perspective distortion...

17mm on APS-C, 28mm on FF, 47mm on 645 are safe FL for group shots

I agree. 28mm on FF is about as wide as you can go and still have people near the edges look normal. 24mm and wider is tricky — people toward the edges start to look wide, so you may end up backing up and cropping to avoid that effect.




  
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hollis_f
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Oct 01, 2012 05:39 |  #9

2n10 wrote in post #15060789 (external link)
DxO Optics Pro has some tools that could be a possibility. Haven't used them in this context though.

I have. Indeed, trying to slim down the people at the edge of an UWA crowd shot was the only reason I ever used DxO Optics. Now the same correction of anamorphic distortions is available as a standalone app or PS/LR plugin - Viewpoint - and I shal probably never load DxO Optics again.

Here's an example...

This is what can happen to somebody standing on the edge of a large group -

IMAGE: http://www.frankhollis.com/temp/Viewpoint%20unchanged.jpg

And this is after one-click in ViewPoint

IMAGE: http://www.frankhollis.com/temp/Viewpoint%20Processed.jpg


Not hard to figure out which is the preferred image.

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Wide Angle Lense Use On Groups
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