Canoe50d

Notice this bird photo. I cropped it 300% and if you look between his legs you see a purple light/line. Can you tell me what might have caused this?? I notice it only after zooming to crop. I zoomed furture to make it really show up.

Thanks

snowbear

It looks like chromatic aberration (color fringing). It's not uncommon, and can be removed with an editor. Some of the lens coatings reduce it.

Canoe50d

Lens coatings?? what is this??

tainkc Loc: Kansas City

Yes. It is a form of chromatic aberration. It is called "fringing". It is the nemesis of cheaper lenses. It can happen with the best of them also if pushed too far under high contrast conditions. Very common on zoom lenses.

You can lessen this by finding the sweet spot of your zoom lens. This means finding the proper aperture, shutter speed, and focal length within the lighting conditions at the time. Tricky to do.

There are plugins, programs and techniques one can use in post processing. I only know Adobe products but this may be of some help if you have something else. I have read tutorials on how to get rid of fringing but some are complicated and all are time consuming. Not my bag. Lightroom has a fringing tool. It is poor at best.

So how do I do it? Easy actually. I pop open photoshop and enlarge the area that is bothering me. I then open the hue/saturation tool. If red is the problem for example, I open the drop down menu which has the colours separated. I will then highlight the red and click on the smallest eyedropper which you would see. then I move the eyedropper over the infected area and click on it. Then I move the saturation slider to the left until the problem goes away. I then repeat as necessary for other colours. It is that easy.

The down side to this quick and dirty way is that if you have other reds that are part of the photograph, they too, will be subdued if not done carefully.

Canoe50d

I hope it's not the lens. Prime 300 f4. Hope it was the light or a setting. thanks for the heads up and the fix.

tainkc Loc: Kansas City

Nope not the lens in this case. Look at what is behind and between the legs. Bright white from missing bark. That will do it every time.

Canoe50d

got it, thanks. I didn't thiink it was a big deal, but first time I saw it so I thought it best to ask.

tainkc Loc: Kansas City

Glad I was of some help. Now you know what it is and what you can do about it. Good question.

russelray Loc: La Mesa CA

You can do the same "quick and dirty" task but use a mask to mask out the areas you don't want to be affected. That way the other reds stay red.

joehel2 Loc: Cherry Hill, NJ

Either chromatic aberration or you captured a picture of the rare One Scarlet Legged Finch (I would be telling my friends the latter)

bkyser Loc: Fly over country in Indiana

You can also select the area, it will only make changes in the area that has been selected. You just have to be careful of the area, or you may have half a leg with less reds and half without. be picky about your selection, and this is a quick and dirty way to make the quick and dirty way you do it work quicker, and a little less dirty.

MIKE GALLAGHER Loc: New Zealand

Fix by Cloning
This is a freehand job. I zoomed till I could change individual pixels and then just chose the pixels I wanted to copy - some white, some from the legs themselves. It means that if I want to be really carefull I can do what I want rather than seeing what a programme decides to give me. See if that helps.
Mike