Astro-Physics RH305 f/3.8 STXL-16200 at -20°C 1.1"/pixel (measured) 60 x 2-min 5-nm H-alpha Dark subtraction, astrometric alignment, median...
I followed the prescription in Photon Transfer: DN -> lambda by Jim Janesick and explained online by Richard Crisp and others. My only addition to...
OK, that is the setting I'm already using and will keep doing so; I was just wondering about powering the fans all the way off.
I recently set up a permanent setup, which means I've also found time to finally characterize my camera. Qualitatively, my raw frames look very...
This is an image that was taken early in the evening a few nights ago as a test image, partly to test unguided imaging and partly to...
I have a STT-3200 and have just set up a permanent observatory in the past few weeks. I have added to my procedure the following: Startup Connect...
Can anyone tell me the distance from the optical axis to the nearest edge of the filter housing (see pictures)? I am considering mounting my...
Incredible. Love seeing three scales: comet, nebula, galaxy.
Marvelous!
@Gert, That is a fanatastic comparison and immediately gets to the heart of why dedicated amateurs equipped with high QE, high dynamic range, low...
There are no surprises in a quick look at the PTC with RBI pre-flash. I've also attached two bias frames with overscan, with and without RBI...
The PTC also tells us a very valuable piece of information: what is the minimum integration time I need to be in the shot noise-limited regime?...
The simplest method I'm aware of is to take pairs of flat frames with the overscan region at differing signal levels. A spreadsheet program is...
Ah, interesting but not surprising in retrospect that the ADC is tuned. Thanks for the info, Doug. Depending on what I was doing, I measured the...
Initial measurements with ~800 data points and no RBI pre flash are: Dark current doubling rate: 6.5°C (spec is 6° nominal) J = 1.92 pA/cm**2 at...
I started my search for a STT-3200 or -1603 just days after the line was discontinued this past summer -- imagine my dismay to discover that they...
Bob, that is correct, RBI pre-flash was making things worse. RBI pre-flash was turned on in ACP, until I correctly configured RoModeInfo.txt. I...
I have set up the camera and scope and played around with some additional ACP configuration files and with Maxim DL. I have been able to confirm...
Thanks! It's nice when everything works! It is an engineering marvel to watch thirty-six 4-minute frames scroll past and see only the noise vary.
Bob, I have only used ACP for a few nights but I am already very impressed with the configurability and scriptability -- I am still on the steep...
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