Unity gain and e-/ADU not what expected

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physics911
Posts: 2
Joined: Wed Feb 06, 2019 10:03 pm

Unity gain and e-/ADU not what expected

Post by physics911 » Wed Feb 06, 2019 10:13 pm

Regarding my ASI1600MM, please see the attached screenshot.
I imaged at gain 139, offset 21, but the FITS header is showing 4.96 e-/ADU, which is what I would expect at gain 0, not 139.

Input on this is appreciated.

Thank you,
Chris
Capture.JPG

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chad
Posts: 480
Joined: Thu Feb 09, 2017 4:58 am

Re: Unity gain and e-/ADU not what expected

Post by chad » Tue Feb 12, 2019 6:31 am

Hi Chris,
This is a mistake of us. We will fix it in the new release which will be freed in this month.
Thanks
Chad
ZWO Driver Engineer
Location:lon=120.6 lat=31.3
SuZhou China

physics911
Posts: 2
Joined: Wed Feb 06, 2019 10:03 pm

Re: Unity gain and e-/ADU not what expected

Post by physics911 » Fri Feb 15, 2019 2:26 am

Chad,
Can you tell me what gain the images were actually?
As you saw from my settings, the gain was 139, but it displayed 4.96 e-/ADU which corresponds to 0 gain.
So were my images 139 gain or 0 gain?

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Sam
Posts: 2734
Joined: Thu Feb 21, 2013 2:51 am

Re: Unity gain and e-/ADU not what expected

Post by Sam » Sat Feb 16, 2019 2:21 am

your gain is correct
just mistake fit head
ZWO Founder
Location:lon=120.6 lat=31.3
SuZhou China

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chad
Posts: 480
Joined: Thu Feb 09, 2017 4:58 am

Re: Unity gain and e-/ADU not what expected

Post by chad » Mon Feb 18, 2019 1:48 am

physics911 wrote:
Fri Feb 15, 2019 2:26 am
Chad,
Can you tell me what gain the images were actually?
As you saw from my settings, the gain was 139, but it displayed 4.96 e-/ADU which corresponds to 0 gain.
So were my images 139 gain or 0 gain?
Sam is right.
You can follow this topic, another customer report this bug to me.
viewtopic.php?f=21&t=8604&start=10
Thanks
Chad
ZWO Driver Engineer
Location:lon=120.6 lat=31.3
SuZhou China

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