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ASI224mc - v1.2 vs v1.3 amp glow

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#1 evan9162

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Posted 26 June 2017 - 11:09 PM

I sent my camera back to ZWO to have the v1.3 board upgrade done.  Tonight I finally got a chance to take some dark frames to compare the difference in amp glow between the two versions.

 

The last set of darks that I took with my '224 was a couple months ago.  I used the same exposure and gain settings, and the same dark frame generation method in DSS.  Given that, these still aren't a complete apples-to-apples comparison.  The v1.2 dark used 14 frames, and the sensor temperature was 12C.  The v1.3 dark uses 20 frames at a sensor temperature of 29C.  So if anything, the new version is at a slight disadvantage due to the higher sensor temperature.  I believe you can see the effects of higher sensor temperature on the increase of noise (hot pixels) in the v1.3 dark.

 

 

 

Both darks are 60 second exposures at a gain of 200.  I performed identical linear stretches to both darks to bring out the amp glow pattern.

 

 

 

v1.2 dark:

ASI224_1.2.jpg

 

 



#2 evan9162

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Posted 26 June 2017 - 11:10 PM

v1.3 dark:

ASI224_1.3.jpg

I don't think anyone can argue with the fact that the new version dramatically reduces amp glow.


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#3 leveye

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Posted 27 June 2017 - 12:06 AM

I really think ZWO puts stuff out to market way too early and with little testing. Glad this worked out for you.


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