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...
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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...
The AISIG meeting on 24 January will be at Roy Ang's house in Rancho Penesquitos. If you have been to a gathering at his home, you will remember his home...
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After a "slight" diversion (starting a new business these days) I was given the OK to purchase a new "fix" for my astronomy addiction. One of Randy's wedges...
Hey Bob thanks for taking a look at this. I figured the Trap was blown out in the image. I've got some settings I can play with in Envisage that might help...
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SDAA_AISIG@yahoogroup...
Jan 17, 2007 6:39 pm
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Here's a sample image taken recently from my backyard using a borrowed Meade ETX 90. It was captured using PrimaryImage (the software I'm developing). The...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the SDAA_AISIG group. File :...
SDAA_AISIG@yahoogroup...
Jan 17, 2007 6:46 pm
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We will hold the January AISIG meeting at Roy Ang's home in Rancho Penesquitos at 7 PM. Directions will be forthcoming. Roy recently picked up a Canon 350XTi...
This is an email that I received from Melaney (SDAA Banquet Coordinator): Hi Bob, At the banquet I am going to bring a laptop with a downloaded slide show of...
Roy, Will you reply with your address and directions. Kin ... From: Kin Searcy To: SDAA_AISIG@yahoogroups.com Sent: Friday, January 19, 2007 6:14 AM Subject:...
Hello All, The fever has struck and I am now considering my next platform addition for the fool on the hill observatory! And of course before I spend a nickel...
Jerry, You have a few choices on mounts: AP1200 (you might get away with a 900, but probably not) Obviously that will blow almost all of your budget, plus...
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