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Old 04-06-2016, 11:31 AM
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Atmos (Colin)
Ultimate Noob

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Join Date: Aug 2011
Location: Melbourne
Posts: 6,980
Quote:
Originally Posted by Camelopardalis View Post
I mean no disrespect, Colin, but running the 1600 at less than unity gain doesn't make a lot of sense to me...you can't capture additional dynamic range, whereas with your 694 you get full 16-bit (well, depending on the gain setting). The only thing I can conceive as an advantage is not blowing out any bright stars in the FOV. But that's just me, I'm keen to be educated

If anyone wants to donate their 694 (or 674, I'm not fussy ) to a good home, PM me and I'll send you my address
The only reason I would consider changing from the 694 is because of its blue response not playing well with refractors (I get large blue halos from UV detection).

After doing a bit of reading random threads on CN, ZWO mentioned that the sensor in this comes from an OMD-D-E-M1.
http://www.sensorgen.info/OlympusOM-D-E-M1.html
As Olympus use this sensor in a few of their cameras, the M10 (http://www.sensorgen.info/OlympusOM-D-E-M10.html) has a reported higher QE so I am going to assume that this is more correct for the ASI1600. 60% peak.

Eyeballing the charts, that gives it a QE of ~42% in SII, ~46% Ha and 54% in OIII.
694 (eyeballing chart for QSI660) is 65% in Ha, 75% in OIII and 61% in SII.
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