Rolfe Lindner

Mine is a CGX had it for almost a year, works flawlessly, last polar alignment was months ago and  go to, the object is still in the field of view. 

Here is my set up

Here is my first  of the horse head , NexStar 8 SE, F6.3 , home made wedge.

FANTASTIC ! Great detail, sharp pic. thanks for sharing!

A full solar image taken Feb 14th.
 Orange Tube C8 with reducer, ZWO ASI294MC Pro, Capture Area=4144x2822, Colour Space=RGB24, Gain=231
Exposure=0.2320ms FrameCount=1000
Captured in SharpCap , processed in RegiStax Best 100 frame stack.

Great Images, thanks for sharing.

6 minutes ago, Rolfe Lindner said:

No

10 minutes ago, jacko61 said:

His friend has suggested taking some images without a reducer to see if there is some fundamental issue with the mirrors. I guess he needs to know the focal plane to be able to get these 'non-reducer' images in as good focus as he possibly can. I'd suggest starting with the camera sensor 127mm from the scope 'baffle' then checking star focus with a bahtinov mask and adjusting from there. 

Graeme

I found this from Celestron 

https://www.celestron.com/blogs/knowledgebase/what-are-the-optimum-back-focus-distances-for-celestron-scts

SCTBack focus distance from primary mirror baffle tube lock ring (in)

C5  5 in

C6  5 in

C8  5 in

So I guess you are correct,  but I just use the T-Adaptor !

1 minute ago, jacko61 said:

Nice image. Are you using any other spacer rings with the T-adaptor?

Graeme

No

I Just use the Celestron  T- Adaptor got this pic from a C8 with ASI 178 mc    

11 minutes ago, jacko61 said:

The very last sentence of the OP that YOU have cut and pasted says exactly what I pasted. . "does anyone know what back focus distance I need when not using a focal reducer on this scope?". I'm not sure why you can't see the word 'not' 8 words from the end. 

Graeme

Back focus distance when not using a focal reducer.? 

Back from where? with out to reducer there is no back focus distance.

Hi every one from southern Quebec Canada.

I've been back into astronomy now for the last 4 years , Bought a C8, it's now on a permanent mount  with the Celestron CGX.

I'm just getting into astrophotography. I have had some success but now with the cgx I'm hoping for much better success in the future.

I'm looking forward to Future conversations with members of the lounge