Old 02-06-2013, 01:39 AM   #1
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Default Wide angle lens distortion

The lead engine in this Danneman image shows some pretty severe lens distortion.

Image © Mike Danneman
PhotoID: 423301
Photograph © Mike Danneman


I guess this is due to way he framed the image. Can you minimize or eliminate this manually using Photoshop or are there lens profiles you can enter in the software that would automatically correct this?
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Old 02-06-2013, 02:27 AM   #2
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You can use a filter in Photoshop called Lens Correction, but sometimes when you correct the vertical distortion, you can create other distortion issues such as making the locomotive/train looked “squished” height-wise. After reviewing what the filter did with this one, I choose to leave it as what was seen from the camera lens, for better or worse.

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Old 02-06-2013, 11:11 AM   #3
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Old 02-06-2013, 03:38 PM   #4
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Jim, Did you use the same filter? It doesn’t look as bad as I remember!

Mike

P.S. I just tried the Photoshop distort/lens correction filter and could not get the same results you did.

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Old 02-06-2013, 03:43 PM   #5
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Nicely done Jim! Would you care to share your technique?
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Old 02-06-2013, 04:03 PM   #6
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If he doesn't, I'll share mine this evening after I'm home from work.

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Old 02-06-2013, 04:05 PM   #7
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I didn't use any of the filters. I've tried to use them before, but I just got too confused. Instead, I like to use the Transform tools: Perspective, Distort and Warp. I suppose it's a little more manual in nature when it comes to the tweaks, but I can usually get the results I want.
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Old 02-06-2013, 04:09 PM   #8
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I dislike the transform tools, so I mainly use correct lens distortion, which works perfectly for me 99% of the time.

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Old 02-06-2013, 04:15 PM   #9
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I guess I need someone to show me in person how to use that properly...as well as the Curves feature. I have no idea what's going on with that one.
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Old 02-06-2013, 09:05 PM   #10
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Jim,

I went ahead and tried the transform tools and they did work better for this particular image. Like you said though, it is a bit more manual to use. I just finished reuploading it to the database too.

Thanks for the input guys!

Mike
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Old 02-06-2013, 10:27 PM   #11
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Looks great, Mike!
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Old 02-07-2013, 12:58 AM   #12
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Out of curiosity, what lens did you use?
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Old 02-07-2013, 01:04 AM   #13
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Here's my guess:

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Old 02-07-2013, 02:27 AM   #14
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Jim is correct. I used the Canon 10-22mm lens set at 11mm with my 7D.

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Old 02-07-2013, 07:05 AM   #15
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Originally Posted by Moffat Road View Post
Jim is correct. I used the Canon 10-22mm lens set at 11mm with my 7D.

Mike
Ah, thanks.



So I guess that lens causes some distortion by design: "The super-wide zoom not only gives you the freedom to get exactly what you want in the shot, it dramatically alters perspective to allow for dynamic expression."


Full description:

Canon EF-S Zoom lens - 10 mm - 22 mm - F/3.5-4.5 - Canon EF-S

With its effective focal length range of approximately 16-35mm in 35mm format, the EF-S 10-22mm f/3.5-4.5 USM is a remarkable lens with outstanding image quality that will take your photography into new dimensions and areas of dramatic expression. The super-wide zoom not only gives you the freedom to get exactly what you want in the shot, it dramatically alters perspective to allow for dynamic expression. The lens allows you to get extremely close to subjects, exaggerating the difference in size between a near object and its background. Creative photographers can use this phenomenon to create excellent separation between subject and background for a strong sense of presence, or for a pan-focus effect with everything from foreground to background sharply in focus. Exceptionally light and compact for its focal length range, the EF-S 10-22mm f/3.5-4.5 USM also has an incredibly close minimum focusing distance of just 24cm. A ring-type USM works in concert with the camera to provide super-fast, precision auto focusing and predictive tracking - with full manual override available at any time. Designed specifically for digital photography, the lens has specially shaped lens elements and Super Spectra coatings to suppress ghosting and flare, which can be caused by reflections off digital camera sensors. An exclusive optional lens hood can further reduce the incidence of flare. A circular aperture provides a pleasing background blur when shooting with a wide aperture; ideal for creating a sense of depth and getting your subject or model to stand out from the background.

Interesting.

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Old 02-07-2013, 10:03 AM   #16
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Here's how I adjust my images in Elements 10:

This is the straight from the camera image: (Canon XS, Tokina 11-16 @ 11mm) The lens exhibits typical distortion for an ultra wide angle, meaning if you point it up or down it really shows the distortion more so than if fired level.



Here's the screenshot in Elements:


And the final image which I would then crop and do my normal editing.



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Old 02-07-2013, 12:53 PM   #17
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Very interesting thread, gentlemen! An UWA is on my short-term shopping list, so I'm taking notes.
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Old 02-08-2013, 01:02 AM   #18
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Originally Posted by magicman_841 View Post
Very interesting thread, gentlemen! An UWA is on my short-term shopping list, so I'm taking notes.
The Canon 16-35mm L is a good lens and the chromatic distortion is minimal.

Of course, you pay for that with a $1000 premium over what the lens above goes for.
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Old 02-08-2013, 02:00 AM   #19
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Quote:
Originally Posted by Holloran Grade View Post
The Canon 16-35mm L is a good lens and the chromatic distortion is minimal.

Of course, you pay for that with a $1000 premium over what the lens above goes for.
Not to mention the additional $100s or $1000s needed to upgrade an APS-C body to a FF body so that the 16-35 gives the same field of view as the 10-22!!
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Old 02-08-2013, 01:57 PM   #20
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Quote:
Originally Posted by Holloran Grade View Post
The Canon 16-35mm L is a good lens and the chromatic distortion is minimal.

Of course, you pay for that with a $1000 premium over what the lens above goes for.
Why are you assuming that I'm a Canon user?
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Old 02-08-2013, 02:15 PM   #21
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Quote:
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Why are you assuming that I'm a Canon user?
Because everybody should be a Canon user? Does Sony even make an UWA?

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Old 02-08-2013, 02:32 PM   #22
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Quote:
Originally Posted by jnohallman View Post
Because everybody should be a Canon user? Does Sony even make an UWA?

Jon
They have a 11-18 of Minolta heritage, but I'm looking at the Tokina 11-16 f/2.8 or the Sigma 10-20 f/3.5.
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Old 02-08-2013, 02:59 PM   #23
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Tokina 11 - 16 f2.8 is a superb lens. Best UWA I've tested / used / abused.

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Old 02-08-2013, 08:34 PM   #24
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Quote:
Originally Posted by Moffat Road View Post
Jim,

I went ahead and tried the transform tools and they did work better for this particular image. Like you said though, it is a bit more manual to use. I just finished reuploading it to the database too.

Thanks for the input guys!

Mike
I see your corrected image has been replaced. Looks great! However, the thumbnail on the front page still shows the distorted shot.
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Old 02-08-2013, 10:39 PM   #25
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Quote:
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I see your corrected image has been replaced. Looks great! However, the thumbnail on the front page still shows the distorted shot.
Yeah, I noticed that too. I wonder if they ever replace the image in the icons?

I also noticed that the original photo in this thread is now the replaced version, making what started the thread not viewable. I’m attaching the original for anyone that wants to see what was done.

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