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Hello all,

I have just received my new ZWO ASI1600MM Pro camera and it works very well :)

However, I was wondering about the ascom driver. I have seen many people set their settings as gain 139 and offset 21, but with the newer drivers, the offset is in the 'advanced' tab. Should I just click Unity Gain and leave it at that, or should I go into the advanced tab and manually select Offset 21? From what I can tell, it does make a slight difference (files attached).

2019-04-07_10-32-21 = Offset not manually selected

2010-04007_12-01-48 = offset manually selected

I do apologise if I am misunderstanding this, as this is my first time working with a dedicated astro camera :) 

D_2019-04-07_10-32-21_180s__-20C_Bin1x1_D 1x1 180s -20 139 _5h__G139.fit D_2019-04-07_12-01-48_180s__-20C_Bin1x1_D 1x1 180s -20 139 21_G139.fit

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Posted (edited)

Hi, offset 21 was a default value on older versions of drivers...

but users had some problems so after the update, current Offset has a proper value... (do not  remember, 50 probably).

Some people even change it to 60.

I would leave as per driver settings...

but of course, you can always experiment and choose what you like best.

Edited by RolandKol
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