Re: Will the Mach 2 support .....

Roland Christen

Result #1: CMOS vs CCD

The 683 has an 8300 chip that's not very efficient but it's monochrome. There are better CCD chips with much higher quantum efficiency such as the Starlight Xpress Pro36, which is a full frame camera with exceptional low noise. It has a 7.4 micron pixel size.

The ZWO 6200C is a color CMOS camera with very low noise, but is it as sensitive as a monochrome CCD? It turns out that it isn't as sensitive as the 8300 monochrome chip. In a side by side test of these two cameras, the ZWO produced a peak intensity of the core of M106 that was only 75% as high as the QSI camera. And that's with a 50% greater light grasp of the 160 EDF vs the 130 EDF that the QSI was attached to. The CMOS did have a signal/noise advantage because of the low noise chip, but part of that was due to the higher light grasp of the 160 mm aperture.

See image below:

-----Original Message-----
From: M Hambrick <mhambrick563@...>
Sent: Tue, Jun 1, 2021 7:51 pm
Subject: Re: [ap-gto] Will the Mach 2 support .....

Thanks for showing us this imaging setup Roland, and yes, please share your results including your guiding graphs.


Roland Christen

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