Shouldn't both realign as well as resize help alleviate the worst of the side effects?
Besides, looking at the test images with the conversion lens on, he has bigger problems than just the CA, There are some blurring in the corners as well.

Simply rescaling the image seems pretty crude to me. It might correct it in one part of the image and make it worse in another. If it doesn't the problem isn't CA and the camera needs attention I think.

Photoshop now has a lens correction filter. Not perfect because no two lenses are identical. I guess if we had a way of doing the analysis on our EX lenses we could do better correction in post. Problem will be chroma subsampling and compression artifacts getting muddled up with the process. The PS technique seems to target RAW camera images.

There's also a good tutorial on doing it simply in After Effects. Again this is a pretty crude trick of simply removing it rather than correcting it however if you watch the tutorial I'm pretty certain you can do this very easily in Vegas using Secondary CC and a mask.

http://library.creativecow.net/articles/larsen_carl/removing_chromatic_aberration.php

Bob.

"... I'm pretty certain you can do this very easily in Vegas using Secondary CC and a mask."

Bob, would you have time to elaborate?

"Like one of the other replies asked, doesn't correction one area create problems in the rest of the image? If not, how!?"

The "other reply" is in fact my own, Jay :)

I'm still after some enlightenment from this forum !

Piotr

Okay, I can get rid of the magenta, but I can't get rid of the resulting green.

Anyone care to provide a sample veg, implementing this method?

I'll give it a go but not tonight.

The technique being used in the AE tutorial is to select the offending color and desaturate it. That part should be easy enough. Of course that could throw other things way out of wack which is why in the last example he masks out the boys face so it is not effected.

There's something about this problem with the EX that has me wondering and watching the AE tutorial further arouses my suspicions. Note in the AE tutorials the fringing is magenta, a mix of red and blue. That makes sense as they're at the opposite ends of the spectum, I'd imagine we judge focus at the centre of the spectum so logically it's going to be the wavelengths furthest from it that suffer the most diffraction.

My problem with what I see in every shot showing the problem with the EX cameras is the CA is almost pure red, where did the blue go?? Thing is we know the EX cameras are more sensitive to red than almost every other camera and that extends beyond the visible spectrum. I've asked one of the posters who was complaining about the CA if he had a 486 filter fitted and no he didn't.

So before we go looking to fix the problem in post I'd like to make certain we can't reduce the problem in the camera. What I'm going to try is shooting something that'll really show the CA problem without my 486 filter fitted and then add the filter in front of the camera. I'm not saying I'm about to make some major break through but it'd be good for someone to check this idea out.

Bob.

Thanks... It will be interesting to see the outcome of your test!

My CA looks, upon magnification, to be magenta.

just posted a sample project on dvinfo forum ;)