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07-15-2013, 04:29 AM   #16
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I think the images look pretty good. I normally wouldn't pay much attention to whatever CA or PF, unless it's very noticeable to be seen.

07-15-2013, 11:09 AM   #17
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Have you read an article on CA? Because there are many different types.
Axial CA is something that is pretty annoying, but if you stop down a little it disappears. Most software cannot fix it, but I think the latest Lightroom can? Axial CA is also called "bokeh fringing" and its basically when the bokeh in front and behind the focus area is fringing in green and purple.
Then there is lateral CA which can be fixed in post processing pretty well (if you shoot jpeg, the camera can do it for Pentax lenses, but it takes some time. If you shoot raw, you can probably automate it with the raw editor software or at least do it manually). There are two types, cyan/pink and blue/yellow. If you fix them in raws, the whole image will also appear sharper.
Then there is purple fringing, which happens with big contrasts, like tree branches in front of a bright sky. This is also pretty unavoidable with high contrast areas. A lot of software can fix this pretty well.

According to a lot of photographers, these annoying aberrations are much more apparent on digital sensors than on film. The problem is that these things are not bothering you at all, until you notice it once, and then you cant stop noticing it. Most people who you show the photos wont even notice these things, though.

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