|
Hi Arek, a creditable result, the partial ring is likely the result of over cooking the sharpening with your processing.
The classic onion ring ( which I would not call this) can be due to a number of things, too much gamma will do it as well as too little gain but the worst cases I have seen probably involved very heavy handed processing on pretty ordinary data.
As the image scale is increased any flaws obviously become more apparent. The tools that are available to amateurs now days are very powerful and it is easy to apply them to heavily in an attempt to extract just that bit more detail.
Looking at this image of yours I think it is just a little over sharpened and that is the cause of the ring artifact. You have listed the equipment used but not your processing regime, without knowing what you are applying to the image it is very hard to give advice, however this is a nice image.
Regards
Trevor
|