Yes, these reflections are only seen with the flattener on.  I Image Linked the images in TheSky X and found none just out of the FOVi but that doesn’t mean it’s not coming from further away.

 

Steve

 

 

From: ap-gto@... [mailto:ap-gto@...]
Sent: Wednesday, February 03, 2016 10:35 AM
To: ap-gto@...
Subject: Re: [ap-gto] Re: Reflections in Images

 

 

Steven,

Your cone nebula image is revealing.  Those little "ring nebula-like" donuts are internal glass reflections.  If you move the scope around a little bit those little donuts will change position relative to the star.  I've seen this as well.  Unfortunately I think these are two separate issues.  The little donuts could be caused by a flattener or reducer.  Was your flattener/reducer in place for the cone nebula shots?

 

I'm still fairly convinced that the very bright arcs are caused by a bright object just off of the FOV.  But, I also don't use an RC scope so it could be different from my experience

joel

 

On Wed, Feb 3, 2016 at 9:28 AM, 'Steven Reilly' sreilly24590@... [ap-gto] <ap-gto@...> wrote:

 

Joel,

 

Have to run the dog to the groomer but when I return I’ll post a few pictures of the imaging train as it is now and the inside/outside of the ota. But no, the dovetail bar does not extend past the end of the ota.

 

Thanks Again,

 

Steve

 

From: ap-gto@... [mailto:ap-gto@...]
Sent: Wednesday, February 03, 2016 10:12 AM
To: ap-gto@...
Subject: Re: [ap-gto] Re: Reflections in Images

 

 

Do the dovetail bars extend past the front of the OTA?  If so that could be a contributing factor.

joel

 

On Wed, Feb 3, 2016 at 9:10 AM, 'Steven Reilly' sreilly24590@... [ap-gto] <ap-gto@...> wrote:

 

Thanks Stefan. I will be looking closer at the ota for anything that might help.

 

Steve

 

From: ap-gto@... [mailto:ap-gto@...]
Sent: Wednesday, February 03, 2016 1:00 AM
To: ap-gto@...
Subject: [ap-gto] Re: Reflections in Images

 

 

Steve,

I have seen some strange artifacts on GSO RC's that came from "false" light directly hitting the chip because either primary and/or seconday baffles were a bit to short. This risk for this increases with chip size. The artifacts have been linear and not circular as in your case, though.

Stefan