Need some advice on which ZWO camera for planetary imaging

ASI's Range of Specialised CMOS camera's

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KimRichards
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Joined: Sat Apr 27, 2019 6:09 am

Need some advice on which ZWO camera for planetary imaging

Post by KimRichards » Mon Mar 23, 2020 1:39 am

Hi,

I have a C14 that I use part of the time for planetary imaging mostly Mars, Jupiter and Saturn with a 2x Powermate and a ASI120MC camera.

I would like to improve the quality of my imaging and am considering the following cameras.

ASI290MM or MC or an ASI385MC.

Can anyone help me decide?

1. The Color option:
The 385 has the same pixel size as the 120 at 3.75 so still would be sampling at roughly 0.1 arcsec/pixel. Would the more sensitive sensor and faster frame rate of the 385 help. For example would 2x binning help.

2. Mono option:
It seems generally accepted that a mono camera with color and UV/IR filters is superior to a color camera. However is it a significant jump in quality?
How much does the need to de-rotate the filter sets individually degrade the image?
If I go with the ASI290MM the pixel size drops to 2.9 and sampling is down to .08 arcsec/pixel so would probably bin to reduce the oversampling. At 2x binning that puts it at almost exactly 1/2 my Dawes limit of 0.33.

The color option is obviously the easiest and cheapest but am willing to go to mono if I am really going to see an improvement.
Thanks for any advice

Kim

Katherine.Tsai
Posts: 519
Joined: Fri Dec 07, 2018 10:24 am

Re: Need some advice on which ZWO camera for planetary imaging

Post by Katherine.Tsai » Mon Mar 23, 2020 7:47 am

ASI290 has smaller pixel size which will lead to over-sampling but I think using Binning can make it better.
I will recommend you ASI224MC for an upgrade since it has the same pixel size as ASI120, but it has a faster frame rate and lower read noise.

KimRichards
Posts: 3
Joined: Sat Apr 27, 2019 6:09 am

Re: Need some advice on which ZWO camera for planetary imaging

Post by KimRichards » Tue Mar 24, 2020 12:04 am

Thanks for the reply. Any thoughts on mono v color?

Katherine.Tsai
Posts: 519
Joined: Fri Dec 07, 2018 10:24 am

Re: Need some advice on which ZWO camera for planetary imaging

Post by Katherine.Tsai » Tue Mar 24, 2020 3:19 am

For the mono camera, you can take 20 minutes exposure and derotate it in the postprocessing image. But for the color image, you can only capture shorter exposure image such as 3 minutes. I think it will make a difference in image quality.

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