All, http://www.celestial-images.com/Bug-Nebula-Ha.jpg Crane Fly (Springtime in Texas) wanted to get his picture taken and was trapped by the filter wheel. No...
hmm, looks more like M51 to me Bill. Cool shot of the fly, would it flat field out ? <g> ... From: William R. Mattil To: narrowbandimaging@yahoogroups.com ...
this is likely to be the last one for me this season. As it stands now I can squeeze in a bit more than a single half hour exposure per night before the crab...
this image is using the Baader 7nm Ha filter in combination with 3nm CS [OIII] and [SII] the oxygen and sulfur usually need to be stretched more than the...
Here's a targeted set of illustrations to show what happens when you are using a sensor that has too shallow of a depletion regions to properly generate charge...
Richard: Very interesting, specially focused to most of the DSRLīs and webcams in the market and the way they behave when the IR filter is removed. Best...
it can be an issue for NIR for a CCD as well Eric. My point in posting it was to make sure people realize that a smeared image may not necessarily be caused by...
I like your taste in images, and Scott's too <g>. Thanks for the nice comments, and I do enjoy them. But I must say that it is the object that's truly...
It is standard practice for scientific images, but not of much use in pretty pictures. Richard Crisp did do a lot as I can remember but it is not anywhere on ...
Don I have done that a bit, I got a red continuum filter from Cust Sci back in December quite frankly I have not done a lot with it as I have been a bit...
Don and others since Don asked, I went back to my best data that I had (taken in early january) and created a webpage to show the halpha data, the continuum...
My latest of the several attempts I've made at this huge object: http://www.buytelescopes.com/gallery/view_photo.asp?pid=12579&c=6425 This try is with an FSQ...
it just keeps getting better Peter. very nice! ... From: erdmanpe To: narrowbandimaging@yahoogroups.com Sent: Saturday, April 21, 2007 7:27 PM Subject: [NBI]...
I have uploaded two jpeg images of darks taken immediately after shooting ten galaxy images of 10 minutes each (unfiltered) and binned 2x2 the first of the two...
Richard, Was there any delay time (if so how much) between either the galaxy images and/or the end of the last galaxy image and the darkframe image? My...
just the time to have the mount park, one bias frame to download, and then the dark started so it went bias, dark, bias, dark, etc until dawn.... Michael...
Richard, So in other words, longer than a typical 10-15 delay programmed between images. IMO, this is good to know in planning sub-exposures because this would...
Mike once you get the RBI, it is hard to get rid of it unless you warm up the sensor and then cool down again My experiment involved shooting 10 2x2 binned and...
Ok, since most of our filters have IR cutoff built into the filter then RBI would really only be a concern for CLEAR and NIR imaging. With my tendency to use...
yes it sometimes has been a problem with halpha in a really bright star: 656nm is long enough that some of the electrons can get trapped in a chip with shallow...
Richard: A silly suggestion, but would it help to erase the RBI by oversaturating the chip before the dark frame is taken (using a flat frame box illuminated...
it is not a silly suggestion because that is the actual solution to the problem Eric. you want to fill the traps before shooting the image. to keep them...
Isn't this what YR is planning to do in their Gold, IR flushing of the chip and Triple TEC cooling? Clear Skies, Michael Hernandez http://www.darkfireastro.com...
sounds about right you can get triple tec cooling for about two years from FLI have you seen any images from a Gold yet? ... From: Michael Hernandez To:...
No, I haven't... According to Daniel's last thread on the ccd-imaging-technology group from Monday Mar26, the boards were supposed to be released to production...
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