... Nice. But the blurring (noise reduction?) is too agressive for my taste. Stan...
68528
Robert
rjhertel2001
Dec 20, 2010 4:44 pm
Thank you, Ron. Re chip saturation, to be concrete, I know a pixel is saturated when I mouse over it in Maxim, etc, and I see 65535 as a value, but is there a...
68529
Stan
stan_ccd
Dec 20, 2010 4:47 pm
Use the uneclipsed moon itself for color balance. It is essentially a neutral gray. Beware that an astro-CCD may not be able to expose short enough to avoid...
68530
Ron Wodaski
rwodaski
Dec 20, 2010 4:51 pm
That's not your saturation value; that's simple 2 to the 16th power. <g> Your chip saturation level is something determined by the camera manufacturer, though...
68531
Robert
rjhertel2001
Dec 20, 2010 5:32 pm
Thanks for saving me some time/diaappointment, Stan. I have a video cam (StellaCam3), so I think I'll try multiple, 30 sec exposures spaced out across the...
68532
marcjousset
Dec 21, 2010 3:29 pm
I agree with you : the blurring is a little bit too agressive on the faints arms and the stars... I have to do a new processing on these parts... Thanks, marc...
68533
marcjousset
Dec 21, 2010 3:29 pm
Thanks Neil, Marc...
68534
randy_nulman
Dec 23, 2010 8:54 pm
Hi Marc, Very nice! I saw the comments about potentially too much blurring/noise reduction, but don't totally agree. I think this is quite nice but maybe...
68535
marcjousset
Dec 24, 2010 12:02 am
Hi Randy, Thanks for your comment. I have seen your image again an again before posting mine. Yours is really a great image, with so much details and beautiful...
68536
randy_nulman
Dec 24, 2010 4:50 pm
Hi Marc, I think you also have some great detail in your image...my only concern was the color saturation. This is a processing decision, not necessarily...
68537
marcjousset
Dec 28, 2010 4:25 pm
Hi Randy, Unfortunately, I was not able to get more RGB during the night. As a result, the SNR in the RGB raw image is really poor. It is one of my main...
68538
randy_nulman
Dec 29, 2010 4:13 pm
Hi Marc, I know what it's like to have limited data, so may I make the following suggestions: First, boost the color saturation via "saturation" PS tools if...
68539
marcjousset
Dec 29, 2010 11:59 pm
Hi Randy, Many thanks for your suggestions. My usual processing is to do first a combine with an opacity of 25% for the L layer. Then I boost the saturation...
68540
ramastronomy
Dec 30, 2010 6:23 pm
Hi SBIG gurus, Please help me I'm bordering on suicidal. I live near the equator. Our astro season has just started. I wasted the whole season last year trying...
68541
Ron Wodaski
rwodaski
Dec 30, 2010 6:25 pm
Two possibilities: * You do not have a good seal, and moisture is easily finding its way into the desiccant chamber. * The condensation isn't in the desiccant...
68542
ramastronomy
Dec 30, 2010 6:55 pm
Hi Ron, Thank you so much for your quick reply. When I set the CCD to take a long exposure and I point a light inside, I see that the small rectangular glass...
68543
Ron Wodaski
rwodaski
Dec 30, 2010 6:56 pm
Assuming you can correctly identify the surface that way (always have to be sure; it sounds like you are saying that the shutter is open because you are...
68544
ramastronomy
Dec 30, 2010 7:21 pm
Indeed I looked straight into the camera hole without a scope in the middle. Your analysis gave me an idea to use a Q-tip to check if the moisture is on the...
68545
focusknobs
Dec 30, 2010 7:26 pm
I would not use a Q-Tip. You'll leave dust and fibers all over the surface. Look at the reflection of a bright light off the window. It should be obvious if...
68546
ramastronomy
Dec 30, 2010 7:37 pm
Good point. Makes perfect sense. Thanks Lou!...
68547
Dean S
searay90350
Dec 30, 2010 8:34 pm
Probably an obvious question, but is the O-ring on your plug? ... From: "ramastronomy" <ramastronomy@...> To: <ccd-newastro@yahoogroups.com> Sent:...
68548
allhoest
Dec 30, 2010 10:14 pm
Hello, I just received a second hand VC200L. I dropped a picture in the file section: ALH_VC200_Scratches&Co_s_circle.jpg The picture was taken with a flash,...
68549
ramastronomy
Dec 30, 2010 10:15 pm
I'm sorry I don't get it. Which plug?...
68550
Ron Wodaski
rwodaski
Dec 30, 2010 10:17 pm
Links like the one you posted are not persistent. You'll need to tell us if the image is in Files or Photos, and if so, in what folder. Ron Wodaski...
68551
Thouse
look-up1
Dec 30, 2010 10:29 pm
Dean is talking bout the desiccant plug that you heat, there is an o-ring on the bottom that MUST be in good shape and installed correctly. Tom ... [Non-text...
68552
ramastronomy
Dec 31, 2010 1:07 pm
I checked and indeed the O-ring is in place. It looks brand new. I barely used the camera so far. Maybe 5 times. Thanks Tom and Dean!...
68553
allhoest
Dec 31, 2010 1:07 pm
... Rgds Alexandre...
68554
Ron Wodaski
rwodaski
Dec 31, 2010 3:59 pm
I can't tell anything from the photo; it could be a lot of things. You may have to attempt a cleaning in order to see what's there. Ron Wodaski...
68555
Dean S
searay90350
Dec 31, 2010 4:53 pm
And again just to make sure, you should also have a dummy plug that is only used to seal the camera when baking the dessicant plug. If it was mine I would take...
68556
allhoest
Dec 31, 2010 6:17 pm
I'll first check the optic under dark sky prior to any other action. Thanks anyway. Alexandre....
