Lens Distortion (Page 2): I think you may have barrel distortion in your lens which tends to occure in lower quality lens. I respectfully disagree; it looks like a perspective problem...

CAM1017 Loc: Chiloquin, Oregon

melismus wrote:

quote=CAM1017 quote=Wezza1977uk Hi Guys br Am ha... (show quote)

Recently I purchased a canon 10-22 mm lens. I was shown a less expensive lens by a non camera body maker. I was able to compare both lens on the same scene. The less costly lens showed the same distortion as in the presented photo which was barrel distortion. The Canon lens did not show the same distortion. The sales person mentioned that I would see the difference. Yes, there may be a perspective situation in the presented scene but it should have been a minor consideration and barely noticeable. Their are lens on the market (Canon) that actually allow for perspective correction. They are kind of costly.

dar_clicks Loc: Utah

Wezza1977uk wrote:

Hi Guys
Am having a problem with distortion in this pic as in reality the steeple is straight. any tips/advice on how to straighten this would be most appreciated have tried using the lens correction tool in cs5 but am far from being a photoshop pro

thanks in advance

There is a lot of interesting geometry going on here! My first thought also was that there might a bit of spherical distortion, but I don't think there is any way to determine that from the photo. It is an old building and not all the elements are straight with each other. I noticed that a simple fix to the steeple left either the window ledge and/or window verticals & roof not looking quite right. A bit of rotate to start then some perspective plus warp to individual sections of the photo got things closer to my eye (still not perfect). It might be best not to get everything perfectly straight -- when looking up at something tall, a bit of convergence or tip looks more natural. I'm submitting this as food for thought in case it triggers some other ideas. -- later note edited: Could the camera's viewpoint be a factor?

combo of rotate, perspective, warp applied

CAM1017 Loc: Chiloquin, Oregon

dar_clicks wrote:

quote=Wezza1977uk Hi Guys br Am having a problem ... (show quote)

This is a very nice PP! Good work. :thumbup:

JohnM Loc: Springfield, Illinois

Wezza1977uk wrote:

Hi Guys
Am having a problem with distortion in this pic as in reality the steeple is straight. any tips/advice on how to straighten this would be most appreciated have tried using the lens correction tool in cs5 but am far from being a photoshop pro

thanks in advance

is it really distortion or just camera tilt?

TNmike Loc: NW TN

As one who is learning PP thanks to those that explained what they did and how they did it. TNmike

Linden

JohnM wrote:

Wezza1977uk wrote:

Hi Guys
Am having a problem with distortion in this pic as in reality the steeple is straight. any tips/advice on how to straighten this would be most appreciated have tried using the lens correction tool in cs5 but am far from being a photoshop pro

thanks in advance

is it really distortion or just camera tilt?

It's camera tilt.......good eye.
Upon close inspection of the original, you can see the steeple is perpendicular to the roof line. There really is no other line to compare to the horizon, so it appears as though the picture just needs to be turned a little and recropped straight.

All of the corrections that were applied by everyone else here left the angle between the steeple and roof line noticeably spread open. Fixing camera tilt leaves everything in the image intact and straight.

Cheers!

stevenelson Loc: Pauls Valley, Oklahoma

I did this a few days ago and I agree that it was nothing but camera tilt. I wonder why the O.P. is hiding?