Quote:
Originally Posted by Slawomir
......Not sure why but in the image without the AOX, stars seem to have more distinct halos.
...... Small improvements at each stage of creating an astroimage do add up and inevitably help to elevete final compositions to new heights.
I was looking into getting an AO unit from SX, but I would not be able to reach correct spacing with my current setup, so I dropped that idea. Maybe with my next scope...  |
I processed the first image last year. I had thought I conducted the sharpening the same way but I reckon I might have done a star reduction on the data. Hence the reason for the halos I think.
Tuning a system is an incremental process in my experience and it can have both steps forward and steps backward.
I had to spend a bit of time making sure I could fit everything in and in the end I changed the mirror separation a little to get everything in to the equation. So if you can more optical elements, then you might be able to get one in to your system.
Quote:
Originally Posted by RickS
Hi Paul,
The stars look harder in the first image. I presume that's a processing artefact? Are the images down sampled?
Cheers,
Rick.
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You're right the stars are harder. Most likely I did not selectively exclude them when doing the sharpening. Star shapes are not that great either. One thing that an AO does provide is round stars.
These are 100% crops Rick. No resampling.
Quote:
Originally Posted by Somnium
great stuff Paul, thanks for posting this. to me it seems it is definitely worth the outlay and the rest ! i wanted to view the images prior to finding out which one was AO to see if i could pick it up, in order to avoid post hock rationalisation, but the difference was clear. particularly with the fine detail in the core and star size. if there was a single demonstration to show the benefit of AO, this is it. results speak much louder that theoretical conjecture!
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I decided to try this upon a comment that Greg made a couple of months ago. I don't really know if this is a definitive demonstration but I thought it showed something for everyone to think about.