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Latest ZWO/ASCOM Driver...

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8 replies to this topic

#1 scopenitout

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Posted 17 November 2017 - 09:01 PM

...where has the control panel slider gone for the offset adjustment??

This surprise came about as I was helping a friend set up his new ASI1600MM-PRO in SGP.

So what's up? Is it a problem? Are we using the correct version?
(SOS...Jon)

#2 ChrisWhite

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Posted 17 November 2017 - 09:08 PM

The pro model does not allow you to adjust offset.   It's fixed (at 50 IIRC).



#3 scopenitout

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Posted 17 November 2017 - 09:17 PM

Ahso. Thank you Chris.
Now, is this change good, bad or insignificant?

#4 powasam5000

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Posted 17 November 2017 - 09:20 PM

Oh man, Im rushing to get all my settings to go to a dark site tomorrow(haven't been in 8 months and I just got this 1600 mono.) and ive been scratching my head for 2 hours about this. My asi 174 as a guide has all the options for gain offset and such but my 1600MM just has gain. Thank god for this site!!! Thanks for the info.



#5 ChrisWhite

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Posted 17 November 2017 - 09:45 PM

Oh man, Im rushing to get all my settings to go to a dark site tomorrow(haven't been in 8 months and I just got this 1600 mono.) and ive been scratching my head for 2 hours about this. My asi 174 as a guide has all the options for gain offset and such but my 1600MM just has gain. Thank god for this site!!! Thanks for the info.


Just for the record, the standard 1600mm driver allows for manually adjusting the offset. It's the pro model that does not.

Good, bad or insignificant? Not sure. You could email Sam at zwo, or maybe someone will stumble along and post the logic.

#6 Jon Rista

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Posted 17 November 2017 - 09:58 PM

...where has the control panel slider gone for the offset adjustment??

This surprise came about as I was helping a friend set up his new ASI1600MM-PRO in SGP.

So what's up? Is it a problem? Are we using the correct version?
(SOS...Jon)

Aye, they removed the offset slider for the Pro cameras. They use the offset for the maximum gain for the given camera for all gain settings. In the case of the ASI1600MM Pro, that is 50 ADU (12-bit). 



#7 scopenitout

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Posted 17 November 2017 - 10:21 PM


...where has the control panel slider gone for the offset adjustment??

This surprise came about as I was helping a friend set up his new ASI1600MM-PRO in SGP.

So what's up? Is it a problem? Are we using the correct version?
(SOS...Jon)

Aye, they removed the offset slider for the Pro cameras. They use the offset for the maximum gain for the given camera for all gain settings. In the case of the ASI1600MM Pro, that is 50 ADU (12-bit).

Thank you, Jon.
Is this fixed offset a change of dubious efficacy?

#8 Jon Rista

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Posted 17 November 2017 - 10:49 PM

I think it is a good change. A lot of people have been confused about what offset is for, and adjusting it, while at higher gains it can have some value for optimizing dynamic range, is really not all that important at unity or lower. By fixing it to the offset of the max gain, they eliminate another thing to have to fiddle with, with minimal impact to IQ. Since so many owners of this camera are more on the beginner side than the advanced side of the equation, I can't think that's a bad thing. 

 

I think having offset is useful under certain circumstances. Very high gain imaging, it can allow you to eek out a little more DR. It's also useful for planetary and other video imaging, where adjusting offset can be very useful in minimizing banding. But those are more niche cases, I think. 



#9 scopenitout

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Posted 17 November 2017 - 11:02 PM

Jon, thank you for that.

I was in a bit of a predicament, a 8300 CCD guy who was asked by a friend to help with this new ZWO 1600 PRO. I said, "We got to set up the gain and offset..."

Like I knew what I was talking about. :)


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