Clear skies, Erik
Visual astronomer, main instruments:
Matthias Wirth 16" f/5 Takahashi FS-102 NSV on EM-10 Celestron 1983 C5
Zeiss, TeleVue and Celestron eyepieces
Nikon 18x70 IF-WP Zeiss Victory FL 7x42 Zeiss Victory FL 10x32
"Normal" people worry me! - If you want to think "outside the square" you really need to get out of your box! A kleptomaniacal plethora of gear: Custom-cooled (my designs) C11&14, Orion Optics (UK) VX16 16" F4 newt waiting for obs, ED127 triplet, NEQ6Pro, HEQ5Pro, ancient AstroOptics EQ mount super-customised with microsteppers, goto etc, ASI120MM, ASI120MC, Flea3 (retired - accepting offers!) Toucam 840k, modded Canon 50d + F4L etc,etc & lots of other homebrew equipment.....
Quote:On a not great night ill run some gamma/gain test.
Quote:Doh! My gamma was set at around .25 (25) somehow in all the excitement I must have unknowingly moved the slider. It has been reset to .5 (50). Il. See how it works out next time. On a not great night ill run some gamma/gain test.
Quote:FireCapture's log texts do have a couple of furphies...
Emil author of AutoStakkert! 2.1 (check out the beta versions!). Webcam Astrophotography - Deepsky, ISS, Sun, Moon & Planetary Images,
Quote:it is perpetually "Shutter=1000.0s"
Quote:Hi Darryl,Don't worry I was just kidding. I'm happy to receive any comment that helps me improving the program. Quote:it is perpetually "Shutter=1000.0s" Is that only for the ASI or also for your other cameras ?Torsten
Quote:Quote:it is perpetually "Shutter=1000.0s" Is that only for the ASI or also for your other cameras ?Torsten
Quote: ometimes the Flea3 logs would give weird focal lengths and quite large variations between reds and the green/blues but atm the ASI cam values are nearly allways "5000mm" for red and "5050/60mm" for the other 2 channels.....but perhaps this is a natural result of diffraction etc altering
Quote:I don't think its seeing, although seeing can do some strange things.
Rather at the lower gain the response was not as linear in that region (gamma NOT 1) as it was with higher gains. I've used lots of cameras over the years and have seen this before. At low gains the left side starting at zero intesnsity starts off flat with an effective gamma much less than one.
Quote:Update. Took the camera out tonight. I didn't notice that all setting in Firecapture were saved for each color channel, and the green channel was set at 12. I thought the Gamma setting was for all channels. I should have known better, the green channel was the channel that rings were occurring the worst. After changing the setting tonight, no rings at all. The problem did lie between the ground and the computer.
Quote:The onion ring effect is a different phenomena caused by non linear operation. I've never seen that result from poor seeing when the settings are correct.