Nice shot Bob! Carey ... _________________________________________________________________ Talk now to your Hotmail contacts with Windows Live Messenger. ...
The article re-inforces what I've seen in practice. Even with the moon, using a CCD Camera you can still get decent shots. This does not work with the DSLR's...
Not sure why a CMOS chip with a bayer matrix would be more sensitive to sky glow than a monochrome CCD? I'm not saying it isnt, just saying that I'm confused...
One possible answer might be the highly elevated green/blue sensitivity of the CMOS chips in consumer cameras. . .sky glow and also light pollution tend to be...
Here is my guess: As the sky gets brighter there is a reduction in the S/N ratio. It would appear that that a camera chip should suffer more from this because...
Ah yes, its the old S/N effect. Makes sense now. ... this because of what you have said. ... larger and the sky gets brighter. ... easier to flat field. ... ...
Reminder from: SDAA_AISIG Yahoo! Group http://groups.yahoo.com/group/SDAA_AISIG/cal AISIG Meeting at MTRP Wednesday December 27, 2006 7:00 pm - 9:00 pm (This...
SDAA_AISIG@yahoogroup...
Dec 22, 2006 3:11 am
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Man there's lots of tiny fuzzies in that Abell shot. Its a very beautiful image. Did I get it right that this was done through your dob?? If so we need more...
Thank You, When you look at the image it is almost like observing. You have to scroll around and the more you look the more you see, Before we took the image,...
The calendar automatically sent out an announcement for December but there is no AISIG meeting in December. The SDAA calendar is correct. I am working on a...
Whoops, this notice was automatic. No meeting over the Christmas holidays and we do not get MTRP back until March. I am planning a meeting in January I hope...
One of the threads on the SBIG groups suggests that a color camera without an IR block might do well in Ha since all of the colors would pick up the Ha. Has...
Hmmm, that doesn't make much sense. . .Ha is *near* IR, but not IR, so an astronomical IR filter of any quality will not impact Ha wavelengths. If you mean...
I know removing the filter greatly increases the Ha in the red channel but I think the point is that the blue and green filters might not reject Ha. Looks...
Hey Vince, did you get an STL-11000M camera too? Boy, I'm getting jealous from all you guys getting STL-11000M cameras lately. Anyway, Vince, nice image of...
Does this make sense? Interesting that they left out the index of refraction of the filters. The angle of the light path changes going through the filters. ...
Yeah I got an 11K too :-)There are halos from both the CCD coverslip (small halos) and the filters (big halos 360 pixels generated 21mm from the chip which is...
Hi Bob, the filters are 3mm thick and the scope was operating at F6.3 image scale is 2.78"/pixel ... filters. ... creating this ... mm range, ... the CCD. ... ...
Hi Vincent, Have you checked with other users of the STL11000? Rob Gendler uses this camera and has taken almost the identical shot as you without any haloes. ...
I have read through most of the write up and I am still puzzled why it left the using the index of refraction of glass. Using your 360 pixel diameter I come...
Pretty Cool Carey ... _________________________________________________________________ Get live scores and news about your team: Add the Live.com Football...
I dont have any uniltered exposures. I think I understand what you are getting at, mostly airspace. Anyway, 360 pixels and 68 pixels are the size of the...
Hi John, well Rob is a master at making those halos invisible<G> From what I can gather, these reflections are normal with the STL cameras as there is so much...
I have not seen any halos but I do not have any long exposures on with bright stars. I am also using astronomic filters which are very thin and probably would...
Check out this image with Astronomik filters, STL-11K, but only 5 min exposures at F5. Be sure to click for the larger image (which is still less than half...
And also check out this image (Astronomik filters) which do display the larger halos. I dont know Bob, I'm really at a loss when trying to determine where...
The halos we're apparently even worse than what Steve Cannistra finally posted. Steve mentions in his description http://www.starrywonders.com/ic443stl.html...
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