Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Small refractor needed for piggy-back on CPC 800; suggestions needed

  • Please log in to reply
1 reply to this topic

#1 jsnatale

jsnatale

    Explorer 1

  • -----
  • topic starter
  • Posts: 96
  • Joined: 13 Aug 2021

Posted 14 October 2021 - 10:18 AM

I have a CPC 800 HD Edge telescope, and am considering getting a small refractor to piggy-back on top of it, for wide-field imaging of deep sky objects, and possibly for use as a guide scope. (My CPC is good for planetary imaging, but not so great for deep sky imaging, due to its limited field of view).

 

There are 3 small refractors I am looking at, all from William Optics: the RedCat 51, ZS73, and GT71.  Do any of you have any experience with any of these, and can you comment on their suitability for deep sky imaging, or for use as a guide scope? The camera I am considering using for imaging with this refractor is a ZWO asi 294, 533, or 183. I already have a ZWO asi 224 which I might end up using as a guide camera with this new scope.

 

My main goal is to be able to get great, wide-field, deep sky images. It would good to get the entire Andromeda galaxy, Orion nebula, and other big objects to completely fit in the field.  Not sure what to look for in a guide scope, but it would be good to be able to use it for that as well eventually. Also weight is a consideration- since it will be piggy-backed on my CPC, I have to make sure it isn't too big or heavy.

 

If you can comment on any of these scopes, or have another you would like to suggest, please let me know. I have heard great things about the RedCat, but am wondering if there are any other ones I should consider, since the RedCat's aperature is only 51mm, and I am not sure it is big enough to give me the detail of deep sky images I am looking for. I haven't heard much about the ZS73 or GT71 though.

 

https://williamoptics.com/redcat-51

https://williamoptic...star-73-iii-apo

https://www.highpoin...il-a-f71gtii-ap

 



#2 GoFish

GoFish

    Mercury-Atlas

  • *****
  • Posts: 2,526
  • Joined: 30 Nov 2016
  • Loc: Wisconsin

Posted 14 October 2021 - 10:37 AM

The CPC800 is an alt/az mount. While great for visual, and acceptable for EAA, I wouldn’t expect the mount’s tracking performance to be up to the task of deep sky imaging. If you plan to use a wedge, then ignore the preceding, but do look into the issues associated with using a wedge with this scope. 


  • jsnatale likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics