Quote:
Originally Posted by Craig_
I don't have the 2600, but do have a 533 (so same sensor tech), and I find flats when using a dual-band filter are usually like 8s or so targetting 20,000 ADU. They are much (much) shorter when using a UV/IR cut.
However, even from Sydney I don't ever find I need flats on such a small sensor.
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Thanks Craig,
Great information
I use the Optolong L Extreme duel band to image emission Nebula and the 2600MC has a UV/ IR protective window so I can expect longer exposures using this arrangement.
Your 533MC has a 14bit ADU ie: max ADU of 32,768 so applying 50% would be around 16,400 ADU. Choosing higher at 20,000 ADU at the same illumination level would take a longer exposure , right ??
Cheers
Martin