... Whoa.... The suggestion to sample at half the 'seeing', is a common _and wrong_ application of Nyquists theorem... Nyquist, shows that for sinusoidal...
Ron, Thanks for such a quick reply. I will post the FITS files on my website. One way to describe this is the stars look fine, however, it is like the...
roger you're trying to extrapolate a 2 dimensional system from a linear set of equations from two unrelated occurances. nyquists theorom deals with the...
hi actually...i'm looking to buy a better camera than what i have now....and i[m looking into this issue very closely...this came up as a point....so i started...
Jason, The pictures do indeed look too small for me to judge as well, but as far as the "ring" (especially with the 2nd picture), did it expand and eventually...
Thanks Randy I made adjustments to the curve how does it look now? Looks like my 21" CRT at work is on par with you all Michael Downing www.astroden.com...
I viewed the image on a calibrated monitor, a Sony Artisan, and it looks just about right on that monitor. If anything, it might be just every so slightly...
Excellent, just what I was looking for Ron, Thank you! I tweaked it a bit more so should be right on I can now setup my home PC with the 19" Sony LCD and IBM...
Roger's discussion of the Nyquist theorem, and the sampling required to get all the available information, is accurate. It matches materials I have read ...
I had a loose secondary assembly once that cause big shifts. The collar around the secondary became loose; the three collimation screws were not loose. Ron...
... looks ... every so ... Ron this brings up the issue of how one goes about running "Color Management" How can we mere mortals accomplish this? It seems of...
The only way to manage color is to calibrate every device (including paper) that you use, using appropriate tools (software and devices). It gets awfully...
Richard, The AP 1200 mount will handle that weight Just use the longer 28" shaft on it I have about 105lbs on mine and it tracks and points perfectly Going to...
DWB-111, a/k/a the Propeller Nebula, is a faint emission nebula in Cygnus. I imaged an LRGB of 50 minute components comprising 5- minuted unguided subframes....
Hello all, I am trying to decide on 1 software purchase for Image processing. I already have CCDSoft V5, CCDOpps, and PhotoShop Elements. I downloaded a trail...
... one too? ... reminds me of the old .50cal sniper rifle. Some of the soldiers called it the ATT rifle because it could "reach out and touch someone". lol ...
Hi Hugh: If you are into imaging, I would recommend MaxIm CCD/DL (the full program with processing and camera control both) AND Photoshop CS. These are two ...
I've only been CCD imaging a month, with an ST-2000XM, and I'm getting progressively better with tuning my system and mount (and processing), so I'm not too...
... Actually, to properly represent that shape without significant aliasing would require much higher sampling than that. Non-sinusoidal shapes are ...
Thanks Bert! Believe I will buy PhotoShop instead of Maxim although I must say that Maxin 4.0 is a nice product. Maxim is missing a"lasso" style command. HN ...
Michael, That looks MUCH better on my monitor. Of course, my monitor is not calibrated as well as Ron's Artisan...but I saw that he mentioned it looked pretty...
Nice Dennis! There are still some gradient issues in the image, and I would suggest using Ron's PS technique (or his software...or Maxim's gradient removal...
I can't comment on PS "elements" vs a full version of PS "CS", but I can tell you Photoshop CS is almost a "must" for final image processing. I agree with...
Hi, Looking forward to seeing your images! With your previous film and Photoshop experience, you should climb the learning curve quickly <g> The typical...
Hi Steve: You're on the right track with your interpretation and it probably would be better if people specified the particular method of combining that they...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
