Correcting barrel distortion when using an extreme wide angle lens: General question: How successful are you at correcting barrel distortion? Before and After examples would be...

LoneRangeFinder Loc: Left field

General question: How successful are you at correcting barrel distortion? Before and After examples would be helpful—along with relevant data: camera, lens, focal length (if zoom).

I am defining “extreme wide angle” as wider than 24mm on a Full frame or 16mm on a crop ASPC.

Thanks

If this is the wrong forum, I’ll ask elsewhere.

jackm1943 Loc: Omaha, Nebraska

Photoshop corrects my 16-35mm Canon nearly perfectly. It doesn't, however, do a good job with my 14mm Rokinon. BTW, I'm shooting FF.

LoneRangeFinder Loc: Left field

jackm1943 wrote:

Photoshop corrects my 16-35mm Canon nearly perfectly. It doesn't, however, do a good job with my 14mm Rokinon. BTW, I'm shooting FF.

Ok clearly the 14 is wider. Is the cleanup issue between the two because the distortion is significantly greater with the Rokinon?

rgrenaderphoto Loc: Hollywood, CA

LoneRangeFinder wrote:

General question: How successful are you at correcting barrel distortion? Before and After examples would be helpfulÃ¢ÂÂalong with relevant data: camera, lens, focal length (if zoom). .

See attached images. #1 is as shot, with a Sigma 15 mm f/2.8 on a D810. Second is with Lightroom's Lens Correction applied. Not perfect examples, it's just what I had on hand. Very simple correction to apply.

(Download)

LoneRangeFinder Loc: Left field

Thanks. A follow up question: if you recall this scene—were those windmills generally vertical or did they lean? Do they lean as a result of the Lightroom lens correction—or is the lean their natural state?

Thanks again. Appreciate the visuals.

jackm1943 Loc: Omaha, Nebraska

LoneRangeFinder wrote:

Ok clearly the 14 is wider. Is the cleanup issue between the two because the distortion is significantly greater with the Rokinon?

Quite a bit more distortion with the Rokinon. It would probably be just fine in non-architecture use, which is the only way I've tried it. I've been told that the 14mm Rokinon is very good for photographing the Milky Way.

jackm1943 Loc: Omaha, Nebraska

LoneRangeFinder wrote:

Thanks. A follow up question: if you recall this scene—were those windmills generally vertical or did they lean? Do they lean as a result of the Lightroom lens correction—or is the lean their natural state?

Thanks again. Appreciate the visuals.

The Photoshop corrections will not correct the leaning, it just makes the leaning items straight so they can be easily straightened if desired.

LoneRangeFinder Loc: Left field

jackm1943 wrote:

The Photoshop corrections will not correct the leaning, it just makes the leaning items straight so they can be easily straightened if desired.

That’s what I thought. Thanks.

Fotoartist Loc: Detroit, Michigan

To correct keystoning on windmills try Transform>Perspective and pull the bottom handles closer together.

rgrenaderphoto Loc: Hollywood, CA

LoneRangeFinder wrote:

Thanks. A follow up question: if you recall this scene—were those windmills generally vertical or did they lean? Do they lean as a result of the Lightroom lens correction—or is the lean their natural state?

Thanks again. Appreciate the visuals.

Lens correction has a problem with straight lines in the distance. Like I said, it isn't a perfect example, but served to illustrate the tool.

Yes, the wind turbines are totally vertical, and are HUGE.

Fotoartist Loc: Detroit, Michigan

I know. Correcting is tough with super wide angle lenses. We should be grateful we can do what we can do.

LoneRangeFinder Loc: Left field

rgrenaderphoto wrote:

Lens correction has a problem with straight lines in the distance. Like I said, it isn't a perfect example, but served to illustrate the tool.

Yes, the wind turbines are totally vertical, and are HUGE.

Thank you. I was considering several of these lenses mentioned and although I’m willing to spend some time doing corrections, it’s not how I want to spend my lab time. I’ll look to other solutions.

Thanks again for your input.

SalvageDiver Loc: Huntington Beach CA

LoneRangeFinder wrote:

General question: How successful are you at correcting barrel distortion? Before and After examples would be helpfulÃ¢ÂÂalong with relevant data: camera, lens, focal length (if zoom).

I am defining Ã¢ÂÂextreme wide angleÃ¢ÂÂ as wider than 24mm on a Full frame or 16mm on a crop ASPC.

Thanks

If this is the wrong forum, IÃ¢ÂÂll ask elsewhere.

Not too difficult. Takes about 30s in PS. Used the Filter>Lens Correction as first step. This was automatic. Then used Filter>ACR>Transform Tool>Guided, to correct for the remaining keystoning. Straightened the horizon, then cropped.

Original

(Download)

Corrected
Corrected...

(Download)

Fotoartist Loc: Detroit, Michigan

Good job.