Experimenting with Sharpening, Evening of 25 September

[Stub Mandrel]

Just a little chunk of the moon covering Shickard to Tycho. Gave me a nice opportunity to experiment with different approaches to sharpening in Astra. This was as far as I could push the sharpening and keep it looking natural.

Very hard to decide where to put the gamma - too high and Tycho loses detail, too low and the terminator loses detail. I've set the JPEG quality to 5, so this should be fairly true to the TIFF version.

Sorry for the odd alignment and proportions.

[JamesF]

That's a very nice image.

James

[Astro Imp]

I like that a lot, some lovely detail showing, well done.

[Steve Ward]

Nicely caught ... 

Pays to save in PNG not JPEG for better viewing after posting .

[Stub Mandrel]

PNG version, just to see what the difference is  (other than bigger):

[Scooot]

PNG version, just to see what the difference is  (other than bigger):

Moon_(9)_extreme.png

Think that looks slightly clearer on my iPad. Great image.

[Stub Mandrel]

Yes, thanks to Steve for the tip, it looks better defined to me as well.

[Bizibilder]

A nice sharp well focussed image.

[Steve Ward]

The difference between the two formats can appear quite subtle until you start looking up close when the fine detail starts to disappear in the JPEG compression and it takes on a 'blocky' appearance.

PNG Crop.

JPEG Crop.

The effect is worse in 'everyday' photos where straight edges develop shadows for one example .