|
No rumors unfortunately, I would be pretty keen for one of those.
Regards bias frames, I don't know if it applies to the ASI1600 but that is the suggestion for the ASI294, don't use bias frames and use dark flats instead. The bit in particular that I don't know applies is that for the ASI294 the on chip electronics control exposures under about 5 seconds (I have never found the exact time) and the ZWO built electronics the times longer than that, which changes the read noise characteristics. That is apparently what makes bias frames no good on the 294, but it also means that if you use flats of less than the threshold time they don't correct properly either. I use a flat panel on a very dim setting with a white sheet over it and 5 second flats with a 5 second dark flat.
The other bit I wonder about Greg (Changing noise in the ASI6200 darks) is that from what I have seen the noise in your typical CMOS camera is much lower than your typical CCD, but it seems to change more between subs. That is why I use as many image subs as I can get and my master darks and flats are normally based on at least 50 individual subs as well as it averages the noise very nicely in the end product.
|