Chromatic aberration correction

[Mystery57]

I've seen a few examples on You tube of this being corrected in photos, but they always seem to be relevant to landscape photos, and adjusting the blue channel in Levels in Photoshop is part of the cure.

I'm trying to correct some CA around a photo of the Moon, which has a black sky behind it so presumably the Blue channel etc will not work.

Can anyone give any pointers on how to approach this

cheers

 

[Spuriousfish]

If you have the full version of Photoshop and not Elements, then you could process the image in ACR (the RAW module) as this has a tool for Chromatic Aberration control.

Alternately if you have Lightroom you can do the same there.

Note: I only have Elements 7 and its not possible in that but maybe later versions include that feature.

Colin

 

[Mystery57]

Hi Colin - missed that tool and have just given it a try but still not getting rid of the white edging to the moon with the black sky, Tried moving all the sliders in assorted directions to no avail

 

[AJQS]

White edging is not CA, it's blur haloing, ghosting (perhaps from a filter) oversharpneing or some combination of the previous. Any chance of a pic?

 

[Mystery57]

Apart from cropping and resizing to jpeg from the original RAW - this is an untouched copy of the photo in question

 

[AJQS]

Looks like focus has been missed, coupled with the green colouring leads me to believe that's bokeh fringing. Desaturate the green channel, that should cure it, or try the chromatic aberration eye dropper to select the colour then use the amount slider to get rid of it. (ACR/LR)

 

[Mystery57]

possibly focus as still haven't got Live View sussed yet for working in the dark - will give those tips a try thanks