Quote:
Originally Posted by The_bluester
Alex, is that with a 2600? I have found that the darks are quite stable, I used my first set for 12 months and only shot new ones as the old default in Astro Pixel Processor used to produce 16 bit calibration frames which could cause some posterisation. I had deleted the raw dark files so I shot a new set last month to create 32 bit master darks. If the camera is not on the scope yet you could shoot darks and bias frames before fitting it and use them for at least a year. It would only take a couple of days to shoot a good number of darks at multiple gains and exposure times and bias frames at multiple gains will not take long at all. I aim for 50 darks of each gain/exposure to make a nice smooth master dark. Just make sure any masters you create are 32 bit. That issue mostly showed up when calibrating with flats, with some difficult to correct brightening of the corners.
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Thanks for addressing my concerns Paul I greatly appreciate your help.
Yes it is a ZWO 2600 mono on the RASA 11 that is my concern. I also have a ZWO 2600 MC the OSC version which won't pose a similar problem as it will probably go on the 80mm permanently.
My assumptions turn on being able to use the RASA with a narrow band set up, which still seems a ,long way off..the only way I could fit the filter draw was to space it some 20 mm away from the camera, for me, an uncomfortable distance from the sensor and in time I want to change this to get the filters as close as possible to the sensor.
I just now saw a flat frame light generator on line for $349 (US $ I think) which motivates me to buy a couple of T shirts. The annoying thing is that I have all the stuff sitting in Sydney to make a flash light box..anyways at least taking something with t-shirts is progress ... the concern is that the tshirt will have to be drapped over the dew shield given the placement of the camera..if that does not work I guess a special ring to hold the shirt just above the camera.
I will start my dark library and probably with the camera on the desk while I work out what to set up for flats..hmmmm maybe take some dark flats ..a variety that I can test...and after shopping some flats to get started.
Thanks again.
Alex