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INDI Library v1.7.8 Released (11 May 2019)

Mid year release of INDI Library v1.7.8 comes with a few drivers and improvements to to existing drivers.

Zwo uncooled VS cooled

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Zwo uncooled VS cooled was created by Gonzothegreat

So, we have the uncooled vs cooled CMOS Zwo cameras, having a TEC has massive advantages over uncooled cameras.

However this is the kind of image you can get from an uncooled ZWO 174MM in 7nm Ha Filter.

source: www.cloudynights.com/topic/522984-the-or...sing-the-zwo-asi174/

And another example from the same user, and with a 7nm Baader Ha filter.

source: www.cloudynights.com/topic/504002-my-new...ono-setup/?p=6769471

I do like the uncooled ones as I could mount it as follow, I do have that bracket.

source: www.cloudynights.com/topic/552863-m31-wi...s-and-imx178-camera/

If the uncooled cameras (talking about Zwo only here) were that bad, I mean everyone is banging their drums about cooling....
why is Zwo keeping an uncooled camera line?!?!

I am interested in the 174MM or 183MM for my Nikon lens to be used as widefield.
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3 weeks 1 day ago #38775
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Replied by wvreeven on topic Zwo uncooled VS cooled

One possible explanation could be that a cooled camera requires more power which can be problematic with a mobile setup in the field. Another explanation could be that as long as you take proper darks (meaning of the same length shot at the same temperature as the lights) then you can do proper noise reduction. The advantage of a cooled camera is that you can control the temperature and create master darks for the temperature at which you shot the lights during daylight. I am sure there are more reasons for wanting an uncooled camera.


Wouter
ASI1600MM-Pro Cooled and filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro

ASI1600MM-Pro Cooled and filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
3 weeks 1 day ago #38778

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Replied by Gonzothegreat on topic Zwo uncooled VS cooled

I can think of costs for example, also from what I read you do not have to expose for 5 min like with a CCD.
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3 weeks 1 day ago #38781

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Replied by jpaana on topic Zwo uncooled VS cooled

For planetary/lunar/solar imaging cooling doesn't really do anything as frames are so short anyway. Longer the exposures, more dark current accumulates. I have uncooled ASI178MC and cooled Atik 383L+ and although they aren't really apples to apples in any way, the difference in dark noise is day and night for long exposures and even 30-60s already shows quite big difference.
Remote observatory running Ubuntu 19.04 x64 with ScopeDome 2M, Skywatcher EQ8 and HEQ5, TS 8" RC, Atik 383L+, ASI178MC, ASI120MM-S, SX Lodestar X2, SX USB wheel with OAG, USB_Focus V3, Gemini SnapCap, USB_DewPoint, KomaHub
3 weeks 1 day ago #38783

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Replied by pentaxian23 on topic Zwo uncooled VS cooled

Wow! Great images. Thats a great setup too. Give that guy kudos for thinking it through.
3 weeks 1 day ago #38784

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Replied by Gonzothegreat on topic Zwo uncooled VS cooled

pentaxian23 wrote: Wow! Great images. Thats a great setup too. Give that guy kudos for thinking it through.


He's taking some amazing pictures with an uncooled camera and a lens only
www.cloudynights.com/topic/571806-the-ro...ns-and-zwo-asi174mm/

and this makes think that less is more....
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3 weeks 1 day ago #38786

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Replied by wvreeven on topic Zwo uncooled VS cooled

Gonzothegreat wrote: I can think of costs for example, also from what I read you do not have to expose for 5 min like with a CCD.


I don’t understand why not cooling would allow for shorter exposures. Unless you talk about CCD vs. CMOS. CMOS chips tend to have a high quantum efficiency allowing for shorter exposure times. I use an ASI1600MM Pro Cooled and take 50 sec images in L and 150 sec in R, G and B but all could be about half and I’d still be ok. The reason I take longer exposures is that it means I only have to stack half the number of images.
ASI1600MM-Pro Cooled and filter wheel with a SkyWatcher Esprit 80 ED on a SkyWatcher HEQ5-Pro

ASI1600MM-Pro Cooled and filter wheel with an 8" TS Ritchey-Chrétien on a SkyWatcher EQ6-R
3 weeks 1 day ago #38787

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Replied by Gonzothegreat on topic Zwo uncooled VS cooled

Talking CMOS only here for the shorter exposures.
Kstars Mac osx
Odroid C1 running indiserver (kept up-to-date with apt-get update/upgrade)
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3 weeks 1 day ago #38788

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