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Originally Posted by Robert_T
This is truly excellent - how on earth (or on the moon  ) did you pull that from poor seeing??? By the way, what's "Negative projection"? Is that just sticking a toucam into a powermate with no eyepiece?
cheers, |
Thanks Guys.
How with poor seeing?... I was lucky in some ways...
1. I took relatively long avis (high frame count)
2. I tried to keep exposure time short (<1/25 sec)
3. I took the time to do a short for drift alignment (drift aligned in azimuth only on Jupiter prior to starting to image - both Jupiter and the moon were high in the sky and I knew my lat adjustment should be close enough)
4. I used lunar tracking rate. Steps 3 and 4 allowed me to capture the long avis...
5. I was really, really careful with focussing. When I got the occasional sharp frame flashing up through the seeing, I was happy... leave it at that.
6. Compromise the number of frames stacked for quality of the images stacked. Fortunately, because I was able to take long avis, this compromise was minimal.
7. Play with different wavelet sets to see what works for the image. Not every image is the same. I tend to try the higher order wavelets first since they work more locally. If the image is sharp enough to only need high order wavelets to crispen it, then using lower order wavelets only introduces artifacts. But be prepared to experiment with wavelets.
8. Have patience.
9. Practice often (as if I do that!
).
Robert, you are absolutely correct about negative projection.
Al.
L.
amazing resolution 
)
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