14-09-2021, 10:24 PM
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Registered User
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Join Date: Dec 2017
Location: Sydney and South Coast NSW
Posts: 6,057
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Quote:
Originally Posted by kosborn
To take flats I use a white t-shirt with the Esprit 100ED and the Newtonian. For the Esprit I use a laptop screen set to mid grey. For the Newtonian I use sky flats just before sunset (the 10" aperture is too big for the laptop screen). I use SGPro which allows you to set desired ADU (I choose 25000) and then uses a flats calibration wizard to work out the best exposure time for that ADU. I take 40 exposures per filter for the ASI1600mm mono or total 40 exposures for the ASI2600mc colour. The exposure time for the darks of course matches the exposure times for the subs and the exposure times for the flats.
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Thanks Kevin,
Brilliant !!
Martin
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