I had been shooting in RAW/JPEG but dropped RAW in favor of conserving disc space, especially since getting the 18MP T2i.  JPEG seemed to work fine until recently.  I've been getting CA and purple fringing rejections.  I must credit iStock for detailing their rejection.  It made it obvious, even to these old eyes.

This happens mostly with my Canon T2i and cheap lenses -- and some with my Tokina 35mm f2.8 Macro.

I am cheap and still using Photoshop Elements for all my cataloging and editing.  I see no way there for correcting Chromatic Aberration.  Make that no "simple" way.  There is a convoluted masking technique that may or may not work?

I found a possible solution in Canon's FREE Digital Photo Professional but it doesn't work with JPEG or TIFF, only RAW.
So, back to shooting RAW.  Unless, someone can recommend a JPEG solution?
Thanks

I found this tutorial: http://www.photoshopelementsuser.com/video/removing-chromatic-aberration-with-elements, and there is more hits on a search on "photoshop elements" and "Chromatic aberration". Disclaimer: I haven't tried any of them.

I have not noticed any correlation between reduction of CR in my expensive L series lenses as opposed to my older Sigma lenses, by the way. The opposite if anything.

Good luck.

I have learned a lot from istock reviews Warren! best agency where reviewing is concerned.
They actualy make you feel you are involved with a professional team of reviewers, not some kids trying to make a quick buck or who love to play bingo.
Mind you they reject all my compositions (which are my best selling images) for overfiltering but they are still my n1 agency where reviewing is concerned.

Always shoot RAW mate, don't even think about JPEG unless you're shooting action and your cam can't keep up.
PS and LR is all you need my friend, don't waste your time on the kiddie stuff (PE)

Later old geezer

Disk space is really cheap now.  Might be worth getting a larger memory card and a cheap usb hard drive to store the images. 

I know what you mean about the old eyes.  Thank goodness for the 100% zoom or I would never spot the noise, c/a etc. 

I just found out that after last update of Adobe Raw - manual chromatic aberration slider controls are gone. According to Adobe Forums I'm not the only one - I'm afraid that it's not a bug but a feature 

Quote from: jm on May 06, 2012, 14:14

I just found out that after last update of Adobe Raw - manual chromatic aberration slider controls are gone. According to Adobe Forums I'm not the only one - I'm afraid that it's not a bug but a feature 

Some feature. 

Lightroom has it.  Hope they don't get rid of it in LR too. 

They do:
Adobe Lighroom 4: The Lens Corrections panel has a minor change, the profile-based chromatic aberration does not have a slider; it is on or off and is independent of whether the Profile Corrections are enabled or disabled. They seem to be pretty confident of the way it works at Adobe to remove the slider. Nice to know that. I would have liked to see that in the manual corrections panel since it is not tied to the profile, but that is a minor issue. The chromatic aberration sliders are gone from the Manual control of the lens corrections as well. Also gone art the lens vignetting sliders. The Effects and Camera Calibration panels round up the tool panels with no change in them.

But to be fair - I just tested this on / off option on my old images taken with cheap Tamron 18-200 where CA was real distaster and it works very well - maybe better that manual sliders.

Both ACR and LR,  will clip the red and yellow channels, Canon as well as Nikon. Both NX and DPP, are optimized for their raw conversions.

Quote from: ShadySue on May 06, 2012, 14:45

Quote from: jm on May 06, 2012, 14:14

I just found out that after last update of Adobe Raw - manual chromatic aberration slider controls are gone. According to Adobe Forums I'm not the only one - I'm afraid that it's not a bug but a feature 

Is that in the beta for CS6, or is it 5.5?
Both CS5 and Elements 10 have the manual chromatic aberration sliders in ACR 6.6.

I have CS5 and I had CA sliders but there was some Adobe Raw update week or two ago and sliders are gone. There is some discussion on Adobe Forum but it's down for maintenance now.

Sh*t, maybe they're trying to force us to buy Lightroom AS WELL as PS, whether we really want its features or not.
Hope it's a mistake. I'm glad I didn't get/see the invitation to update RAW. Odd, I've had  updates to pdf in the past week.
Tx for the warning.

That's interesting about the different types of CA. I have noticed, as I guess everyone has, that some kinds of CA are easy to fix and others are almost impossible. The fully-finished product may well get it all sorted.
I don't usually dive in to betas, I'm a classic 'slow adopter'!
Tx for the links.

That's interesting about the different types of CA. I have noticed, as I guess everyone has, that some kinds of CA are easy to fix and others are almost impossible. The fully-finished product may well get it all sorted.
I don't usually dive in to betas, I'm a classic 'slow adopter'!
Tx for the links.

It didn't look like beta, it was just another Adobe product update. When I look at "about CR" it doesn't look like beta either. But after short testing it seems it really works well.

Sorry, I obviously was behind the curve

All ideas and recommendations appreciated. 
Looking like returning to RAW processing may be best answer.

Warren!  once an image in jpg or tiff, no! it cant be corrected for CA, unless a hell of a lot of "fine tuning" in PS, takes ages. Use Canons DPP and shoot in RAW, only there can you effectivly remove CA or fringing, ( not the same though).

Binuscan and Barco, have got CA removers, mainly for the film industry but I doubt you want to fork out 5K, for these programs. Also, for any raw conversions, forget the generalist converters such as ACR and LR,  stick to the camera-makers own converter.

I use Elements with the PTLens plug in to correct CA.  It's only $25 and does a great job.
http://epaperpress.com/ptlens/

Actually, thats a good plug-in,  but can it be used as a stand-alone application?