Old 09-12-2010, 04:38 PM   #1
hioo1
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Default Lens distortion

I was wondering how everyone deals with the lens distortion on a wide angle lens, for example do you use photo editing software to correct it or do you leave it as is?
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Old 09-12-2010, 08:38 PM   #2
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pet peeve - imprecision in use of the term distortion

perspective distortion: arises from optics and is not a lens flaw. The type varies depending on whether a lens is standard (rectilinear) or fisheye (are there other kinds?). I usually correct in software as I like the look of having all verticals vertical over the look of having things on the edges tilt in.

barrel distortion and pincushion distortion: arises from lens flaw - flaw in the sense of imperfection, not in the sense of a mistake in design, as it is one of many dimensions that a lens designer has to deal with and you can't make a lens perfect in every respect, plus compact plus inexpensive. Can also be dealt with in software. None of my lenses has it bad enough to notice in any regular application.
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Old 09-12-2010, 09:52 PM   #3
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to clarify i was referring to barrel/pincushion distorsion, I have an 18-200 lens and on the 18 it can be very noticeable.
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Old 09-13-2010, 01:49 AM   #4
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Barrel distortion? Kill it with photoshop. (Camera RAW 6.1 is sweet)
Perspective distortion? depends...again, Camera RAW 6.1 is sweet.
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Old 09-14-2010, 02:28 PM   #5
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Photoshop can correct it relatively easily. I have a 17-40L and it's a lot more noticable on my 5d than my crop cameras.
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Old 09-23-2010, 02:00 AM   #6
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Thought that was an odd question:

Barrel distortion is due to a defect or shortcomings of a lens and I can not imagine any artistic merit gained by not correcting it.

On the other hand, I've often wondered if /when perspective distortion should be corrected. I personally attempt to correct all perspective issues when shooting wide as I like to present my images as I see them with my eyes. The thought of a mid to low rise building or a pole leaning inwards or worse, a train practically lying down looks rather off to me. On the other hand, there is no better way to re-enforce the towering height of a tall object.

Then there are those shots in the middle where the effect is perhaps more appealing then the correction:

A friend of mine surprised me when she said the uncorrected one was "wild" though for RP I think the corrected is more suitable. On the other hand, J.E. Landrum has inspired my artistic side - Da da (da... ).

/Mitch
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Old 09-26-2010, 01:48 AM   #7
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To deal with wide angle lens distortion (hopefully I'm avoiding the Professor's peeves :

1. Stand back, use longer a longer millimeter.
2. Use editing software.
3. Incorporate it into the shot.

This from a guy who remembers a time when there were people who considered any lens wider than 35mm as "extreme."
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Last edited by Dennis A. Livesey; 09-26-2010 at 03:47 AM. Reason: <* Note: The Professor gave me a D for not proof reading this.>
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Old 09-26-2010, 02:15 AM   #8
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Quote:
Originally Posted by Dennis A. Livesey View Post
To deal with wide angle lens distortion (hopefully I'm avoiding the Professor's peeves :
I have managed to endure my peeves over the years, BUT ...

Quote:
1. Stand back, use longer a longer millimeter.
"longer a longer millimeter"

"LONGER A LONGER MILLIMETER"

???

have you just lost it, man? hast thou just blown thou mind-piston through thy cranium?

???

Sure, I've had a glass of wine tonight, but I am still holding it together ...
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Old 09-26-2010, 03:37 AM   #9
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No longer a longer can I can I work without out a pet peeve a peeve proof a reader...
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Old 09-26-2010, 04:59 AM   #10
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My head hurts from how hard I hit the keyboard with it.
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