Green CA?

I've seen purple fringing before . . . but never green. How do I deal with this?

I tried using the Chromatic Aberration tool in Camera Raw, but it didn't really do anything. It always seems to work with purple fringing.

Help!

Post the RAW file Shelley and I'll take a look.

rrblint wrote in post #17942387
Post the RAW file Shelley and I'll take a look.

I've got it uploading to Dropbox.

https://www.dropbox.co​m …fr5o2d1/246A631​3.CR2?dl=0

I've got a couple of others that are pretty bad as well. I was giving this lens a real workout today to get to know it. I used it wide open all day (with a 3 stop ND filter), and I tested it in high contrast, backlit, and wide dynamic range situations.

I am a little shocked by how bad the green CA is, but I'm pretty impressed with the lens apart from that.

Edit: Note that I was playing with really warming up the white balance. The RAW file was shot with a very different WB, and the green CA appears just as prevalent to me before messing with the WB.

Might have to zoom in, in PS, and do a selective color selection, and either neutralize it or change the hue/saturation.

-Douglas- wrote in post #17942402
Might have to zoom in, in PS, and do a selective color selection, and either neutralize it or change the hue/saturation.

Hmm. I will try that out.

This is (clearly) a pretty unimportant photograph. But, I better get this sorted out. In the future it may happen to an important photograph.

Edit: This is one of the animatronic dinosaurs at the Calgary Zoo. It roars, moves, and scares little kids. http://www.calgaryzoo.​com …al-events/dinosaurs-alive

I didn't have any trouble getting rid of it as a jpeg. All I did was adjust the Green Amount under Defringe.

It's got both purple and green CA. The purple I can handle but the green is persistent. I'm still working on it.

D Thompson wrote in post #17942463
I didn't have any trouble getting rid of it as a jpeg. All I did was adjust the Green Amount under Defringe.

Hosted photo: posted by D Thompson in
./showthread.php?p=179​42463&i=i105624333
forum: RAW, Post Processing & Printing

Did you do it in Camera Raw? If so, is it the latest update? I'm using the most current update.

rrblint wrote in post #17942498
It's got both purple and green CA. The purple I can handle but the green is persistent. I'm still working on it.

I didn't even notice it had purple. Maybe I got rid of the purple in my basic lens adjustments before I even noticed it?

Or, I'm so hung up the green I don't see the purple.

This is weird.

I was able to remove the green CA from the JPEG: using the defringing in the latest update of Camera Raw. I jacked up the green defringing all of the way, and then I changed the "Green Hue" to include all of the greens. It was obliterated.

The same adjustment doesn't appear to work on the RAW file.

I'm going to test it on a 16bit TIFF tomorrow. If it works on the TIFF, that might be a quick work around.

don't have the latest PS but is it one of those adjustments where you have to zoom in all the way to 100 percent to see the effect in the preview?

I can get rid of both colors of CA by desaturating both colors and painting back in on the dinosaur. This would be too extreme a measure to take for important photos IMO.

neacail wrote in post #17942504
Did you do it in Camera Raw? If so, is it the latest update? I'm using the most current update.

Yes, I did it in Camera Raw. I'm still using CS6, ACR version 8.7.1.311.

Here is a crop of the RAW file in the area I thought was the worst. Camera Profile set to Camera Neutral. Remove Chromatic Aberration was checked, Defringe set to Purple Amount = 10, Purple Hue = 30/70, Green Amount = 15, Green Hue = 30/75. Everything else at Default.

^^^^That looks good Dennis.