Here's how I'm imaging right now:
EQ8 (Orion HDX110)
AT65 scope (420mm)
ASI174 guide cam on Celestron OAG
T5i imaging camera
I switch off between the AT65 and the 8" Edge.
My stars look good - but this is @ 420mm FL.
I want to improve my guiding.
Here's a guide log from last night with the above equipment set up
PHD2_GuideLog_2019-09-21_204653.txt 187.51KB 7 downloads
Here are a few things that I THINK I know from running calibrations and running the guiding assistant:
I do have some DEC backlash - when I run the GA in some quadrants - it is negligible - other quadrants - not so good - in some places - pretty bad.
Here is the result from the last time I ran the guiding assistant:
And here's my last calibration:
As I mentioned - sometimes the backlash test yields much better results (nice matching lines) - sometimes worse results than the one posted above.
I have not yet run PEC on the mount - but plan to do so soon using the EQMOD procedure.
My question is - what would you do next?
Go into the mount and make adjustments to the DEC axis to reduce the backlash? I understand how to do it - but would rather not make mechanical adjustments to the DEC axis unless I just have to.
Run PEC on the mount and see if that helps?
I usually try to perfectly balance. (The EQ8s are not easy - but if you work at it - you can get it balanced)
Should I try a little east heavy and a little camera heavy?
Or just try to improve the guiding by making changes to the PHD2 settings?
I plan to go back to imaging with my 8" Edge HD and I believe I am going to need to get my guiding to perform better in order to get good images at that FL. When I have the 8" Edge on the mount - my guiding generally has been about the same - not much better or much worse. Sometimes as low as .6 or .7" but often 1.2" and higher. Seems to waffle around a lot.
I am wondering if you all think running PEC on the mount and trying to adjust the DEC backlash might improve overall performance.
Thanks for any advice or recommendations you might offer...