Canon 17-85 - chromatic aberration !!!

07/16/2008 04:16:12 PM · #1

Hi All,

Using a 17-85 with a 40D and a great deal of my pics suffer from chromatic aberration.

Is their anything I can do to stop it happening?

if not can anyone recomend better general purpose lens.

17-55 looks great - but its Â£550 !!!!

I think Canon should refund me for this.

cheers all

Message edited by author 2008-07-16 16:50:52.

gloda

07/16/2008 04:55:49 PM · #2

Try stopping the lens down a bit. I don't think chromatic aberration is reason enough to claim a refund, but if you bought the lens only recently you could ask the shop you bought it from to replace it - if the CA is beyond what's acceptable, that is. You're not the only one complaining about it.
Edit: I don't think your posted example suffers from bad CA. I can't see any apart from beneath the neck, and that might still be from sharpening. Any 100% crops of what you identify as problem areas?

Message edited by author 2008-07-16 16:57:55.

scalvert

Canon EOS-5D Mark III

07/16/2008 05:00:47 PM · #3

I think he's complaining about the edge on the background trees, but I don't know if that's even CA, and I think the photo looks pretty darn good otherwise.

07/16/2008 05:02:00 PM · #4

cheers Gloda.....

check out the tops of the of the trees on the left hand side of the pic......their is a green line edging around it...

07/16/2008 05:03:03 PM · #5

this green line thing is haunting me on other pics....its always green too......

if its not CA - what is it ?

look under the arch on the right hand side

Message edited by author 2008-07-16 17:16:56.

doctornick

Apple iPhone 13 Pro

07/16/2008 05:21:07 PM · #6

Originally posted by TonyUK:

this green line thing is haunting me on other pics....its always green too......

if its not CA - what is it ?

look under the arch on the right hand side

That's a a 1 sec fix in lightroom. My 16-35 and 24-70 Canon's can give CA under certain light conditions. Easy fix like I said.

Message edited by author 2008-07-16 17:21:20.

07/16/2008 05:25:41 PM · #7

please - whats the fix!!!!!

I have lightroom - what do I need to do ?

cheers

Tony

doctornick

Apple iPhone 13 Pro

07/16/2008 05:30:42 PM · #8

Under the Develop Tab go all the way down to the "Lens Correction" Module you'll see the Chromatic aberration Sliders. Usually the CA is of the Red/Cyan kind. Magnify your image to 3x at the spot where CA is visible and move the Red/Cyan sliders either way and they'll disappear like magic!

07/16/2008 05:32:08 PM · #9

Cheers Doc

appreciated

07/16/2008 05:35:03 PM · #10

doesnt seem to work...

doctornick

Apple iPhone 13 Pro

07/16/2008 05:46:21 PM · #11

Originally posted by TonyUK:

doesnt seem to work...

pm'd you

DrAchoo

Panasonic Lumix DMC-LX5