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  #1  
Old 20-02-2018, 10:01 PM
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lazjen (Chris)
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New Guide Camera and more...

I'd like to get a more sensitive guide camera to use in my OAG. That by itself is probably not a difficult thing to achieve.

However, if it's all possible I'd like to use it with my solar scope as well: Coronado SM60. So, ideally I'd like something that can take fast frame rates, is USB3 and maybe low noise in warm weather.

My main scope is an RC10 with a 0.67 reducer (have to check the setup again, it might be closer to 0.7/0.75), so 1300 to 1500mm.

Is this possible? Suggestions?
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  #2  
Old 21-02-2018, 10:06 AM
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The ASI290 Mini ($299) and 174 Mini ($499 and has 4x the FOV) are awesome guide cameras, capable of planetary use. However, they are USB2.

The ASI 174 is USB3 and not cooled, costs $599, I'd suggest having a look at these. I'm getting the 174 mini for a guide camera soon.

Discussions and info here at CN -https://www.cloudynights.com/topic/589232-zwo-290mm-mini-guidecam-beta-test-thread/

Last edited by StuTodd; 21-02-2018 at 12:39 PM.
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  #3  
Old 21-02-2018, 06:06 PM
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Thanks, I'm going through that thread.

As for the ASI 174 USB3 version - I'll have to try doing some calculations/measurements to see if I could fit a wider body camera in place and still focus properly.
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  #4  
Old 21-02-2018, 06:29 PM
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Merlin66 (Ken)
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Chris,
I have and use the SM60/ED80 and find the plate scale with the ASI 174 under samples...the ASI178 would be better.
An ideal guider needs pretty big and sensitive pixels. In my case I use the Lodestar (occasionally the QHY5Lii)
Iím not sure your needs are compatible.
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  #5  
Old 21-02-2018, 07:33 PM
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lazjen (Chris)
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Ken, you are probably right. I think I have to accept it will be 2 different cameras.

Which means, I can probably go for the ASI 174 mini for the guide camera and the ASI 178 MM for the solar scope. I assume there is no real need for a cooled camera for the solar scope? So this version would be ok: https://astronomy-imaging-camera.com...si178mm-mono/?
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  #6  
Old 21-02-2018, 07:37 PM
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Merlin66 (Ken)
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Chris,
Sounds good.
Iím serious about the ASI 178 for solar. Higher frame rates are more important than cooling.
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  #7  
Old 21-02-2018, 07:41 PM
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Got it. I just shot off a message to Bintel (as I'd prefer to go through an Australian store) to ask about the ASI 178MM - they've got the cooled version and the non-cooled colour on the website, but not the non-cooled mono (unless I was completely blind ).
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  #8  
Old 21-02-2018, 08:14 PM
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Merlin66 (Ken)
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Yeah,
Iím looking at ZWO directly......
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  #9  
Old 22-02-2018, 12:09 AM
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Yeah, I can understand why: shipping is free either place and going direct means probably no GST. Basically after the exchange rate that's essentially the extra bit to the Australian price.
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  #10  
Old 22-02-2018, 09:01 AM
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The shipping directly from ZWO has been really fast in the past.
You'll not be disappointed with the 174 mini for guiding.
Looking forward to seeing your solar works soon
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  #11  
Old 22-02-2018, 10:20 AM
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Chris, check the size of the prism of your OAG. The 174 is a big chip (relatively) and could result in some nasty vignetting if there is too much disparity.
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  #12  
Old 22-02-2018, 10:29 AM
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Thanks Dunk, yeah I am expecting the vignetting - but that should be ok since it still should be an improvement over the ST-i and a heap more sensitive.
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  #13  
Old 22-02-2018, 10:38 AM
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Camelopardalis (Dunk)
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While this goes against conventional wisdom, if you see a 224 going cheap...they make an excellent guide cam (despite being OSC) and planetary cam
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  #14  
Old 22-02-2018, 06:31 PM
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Since I'm going 2 different cameras now, I'm going to avoid form factor issues and go with the tube (mini) and not the flat pancakes. So, 174 mini it will be.
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  #15  
Old 19-03-2018, 03:32 PM
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An update on this. I've got the ASI174 mini now and popped it into place.

As expected there's vignetting. However - who cares! The sensitivity is amazing and I'm spoiled for choice for guide stars now. Really happy with the result.
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  #16  
Old 19-03-2018, 03:42 PM
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I ended up ordering the ASI 183MM, same size pixel (2.4micron) and larger chip (13.2 x 8.8 mm), but with similar frame rates to the 178 at a ROI 3840 x 3672 pixel .......
Still waiting on delivery.
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  #17  
Old 19-03-2018, 09:07 PM
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Double
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