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04/09/2010 02:49:52 PM · #1 |
...or should I say, once you've fixed CA in one part of a pic, how do you ensure that your efforts to correct the CA don't result in yet more CA, in other parts of the pic?
For example I fixed some cyan CA at 100%, but while moving the sliders around, saw pretty much everything else looking like it was starting to develop a lovely shade of yellow/green CA in other parts of the pic.
Is this to be expected? Any hints/tips/tricks greatly appreciated. I
I am working with PS CS2 for Mac. |
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04/09/2010 03:13:46 PM · #2 |
In those cases, the only advice I have (and god I hope someone tells me I've been doing it all wrong) is to do it pixel by pixel..
Zoom way the heck in and start poking around with the clone stamp.
That's it, except maybe to tell you that a hardness of about 85% works well.
Cheers,
Cory
PS Really, please, someone tell me there IS a better way. :) |
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04/09/2010 03:17:52 PM · #3 |
I use the magic wand to grab that color and then use replace color to change it.
Or convert the image to black and white. That's the easiest... |
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04/09/2010 03:27:06 PM · #4 |
The key question here is whether you shot in RAW or JPEG. If you shot in RAW, then you can correct during conversion. Since you are using CS2, you have an older version of ACR, but I'm fairly sure that not that much has changed with CA correction.
When correcting in RAW, look at a section of the photo about 3/4 of the way from the center toward the corner and adjust the sliders until you have best results there. Now check along the line between the center and the corner, and tweak a little more if required.
If you shot in JPEG, you can still open the file in ACR and use this adjustment. From Ps, select File>Open As, choose Camera RAW as the type, and select the file to open. Make your CA (and any other) adjustments in ACR, and click the "Open Image" button. |
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04/09/2010 03:34:55 PM · #5 |
| I thought the D90 had a setting in menus to prevent this occuring in the first place, I know the D300 does and the D90 has much of the D300 menus. |
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04/09/2010 06:43:04 PM · #6 |
That's what I love about this site, so many people who do know what they're talking about help out! And I mean that in the genuine, not sarcastic sense.
 dahkota, hmm, magic wand tool sounds like it might come in handy. Haven't used it really, mostly I use clone tool (thanks for the tip too there,  coryboehne)or the more unpredictable healing tool. Have already cheated and did the b/w thing that had an absolutely horrendous amount of CA.
kirbic, I shoot RAW but convert to TIFF for working in PS, then save final result as a jpeg.
SteveJ, I can already here *ahem* a certain C-T R telling me to 'Read the manual!' Or in my case, both the manual and the Magic Lantern guide. So I better trot off and see if there is indeed a built-in menu setting to prevent this. And yes there are many parallels between the D90 and D300, so yes it could well be there in the menus. Or sub-menus. Or sub-sub-menus....gaah!
Thanks all! :-) |
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