View Full Version : Blue/purple fringing?????
12-24-2003, 06:48 PM
Is there a way to control or eliminate the blue fringing as shown in this sample? It occurs mostly near the edges and when backlighted by the sky. I know I could back off of the subject to leave room for cropping and then cropping the edges where blue fringing occured, but at times that's not desireable. Can it be removed with PS? I've been plaing with PS, but not having a lot of luck. Maybe change the sky to blue (this was a grey day)? What causes it? Lens? Camera? Gremlins?
12-24-2003, 10:40 PM
I don't really know Rich but I'd guess White Balance not set for cloudy or overexposed & then high compression? Like I said I don't know but that's where I'd start if it were me.:D
12-25-2003, 08:07 AM
Here is a tutorial you might find usefulcorrecting Chromatic Aberrations (http://www.outdooreyes.com/photo26.php3)
Not much can be done in camera. It is the curse of digital I guess!
Here is another one to correct it. I have used it and it works great.
12-25-2003, 03:54 PM
You could also try the downloadable demo of Digiphoto Cleaner (http://www.editspeed.com/pcfea.htm)
If you have PSP try playing with Effects->Enhance Photo->Moire Pattern Removal.
In the field, fully open lenses tend to cause more fringing than lenses stopped down to say f8.
Some cameras have jpeg compression algorithms that exacerbate the fringing because they sharpen too much. Try shooting RAW or 'soft' and sharpen in software outside of the camera.
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