horrible guiding with ZWO OAG-L and ASI120MM

Rob:
Do you focus the guiding camera in the guiding screen or do you switch the guide camera over as your main camera in the ASIAIR to focus it?  

I have the same camera with my OAG (not the L one) and it's sensor is so tiny that I have a very small FOV to get any stars from.  I always focus the guide camera as the 'main' camera in ASIAIR.  I bought the helical focuser for it to make it easier.    Make sure you changed the focal length in the ASIAIR settings for your guide camera to match your main camera.  If you focus it like I do as "main" you can plate solve the image and get the actual focal length to use for the guiding menu.

Only thing I can think of is the 120MM being an "issue"

It's a lovely camera, but you might be pushing it for an OAG, especially through the 200PDS.
it's easy to get enough stars for guiding with a 30mm guidescope. But your field of view with an OAG becomes ALOT smaller, maybe too small for the small sensor.

Are you sure you're getting enough stars for the ASIAIR to use? Perhaps upping the gain and sensitivity might get you more stars and more things to work with for your ASIAIR. Hope that helps

Otherwise, you may need to upgrade to a 290/220/174

Any screenshots could perhaps help. Best of luck!

Stefan Pfleger:

Christian Bennich:
Hey

I am setting up my new camera with the ZWO OAG-L as well. 
Previously I was auto-guiding with the ZWO 30mm guide scope and the ASI120MM.

Today I switched to my new camera, which has perfect focus. But my guiding is now horrible. 

I have what I believe is a good focus with the guide camera.

What should be a good set of standard settings to start with when auto-guiding with the OAG-L.
are there any good videos or descriptions of how to configure for OAG guiding??

It's both my RA and DEC that's fubar. 
I have rebalanced my scope, recalibrated the guider in the ASIAIR app etc. 

I have during the night tried different settings with the guide system on the ASIAIR. 

Currently I have the following:
Calbration step: 8000
Max DEC: 2500
DEC Aggr: 50%
Max RA: 2500
RA Aggr: 50%
Exposure - tested both short and longer - up to 5 seconds

I image with the Skywatcher 200 PDS, ASI2600MM and the EFW (36mm) as well and I have 55mm backfocus as described in the documentation. 
The OAG is placed in front of the filterwheel as described here: https://astronomy-imaging-camera.com/wp-content/uploads/APS-C冷冻相机加OAGL连接方案-英文.jpg

Any help, input etc. on how

Could we see a guide log? With the OAG your pixel scale will have improved a lot. It could have been that you had issues in your mount all along which the old guide scope didn't really pick up on. This happened to me anyway, upon upgrading to a bigger guide scope I had to readjust the agression settings and I also had to work on my backlash.

Only thing I can think of is the 120MM being an "issue"

It's a lovely camera, but you might be pushing it for an OAG, especially through the 200PDS.
it's easy to get enough stars for guiding with a 30mm guidescope. But your field of view with an OAG becomes ALOT smaller, maybe too small for the small sensor.

Are you sure you're getting enough stars for the ASIAIR to use? Perhaps upping the gain and sensitivity might get you more stars and more things to work with for your ASIAIR. Hope that helps

Otherwise, you may need to upgrade to a 290/220/174

Any screenshots could perhaps help. Best of luck!