OAG-L

This is the first OAG I’ve tried so I have no means to compare to other brands, anyway, it’s sturdy, good construction but three out of 20 screws that I have to install (a lot of screws!) the screw head were stripped. It is very easily to get the head screw stripped, the screws are small, difficult to grasp and very easily stripped out, I wish there would be a better and easily method to assemble. I bought the L version and definitely need the filter wheel package option since changing the filter without this adapter means to dismantle everything (>12 screws! and head screw strip risk at any of them). This is the only OAG I’ve tried and I noticed It’s very easy to use with a touptek camera and very difficult with any other camera so I don’t know if that will be the case wit an OAG from another brand. I have yet to tried in a session for test if it will focus "well", I mean guide camera and main camera at the same position. Anyway, so far my conclusion is: I wish there could be an easy way to do off axis guiding.

Had one night of trying maybe I need to raise the prism a little more to get it out of the way of the main camera. But my guiding numbers have improved significant. so far so good.

The helical focuser is very nice. This is my first OAG and using it with the Askar 71F, ToupTek ATR585M and AFW-M. I was a bit concerned at first as the blue focuser ring just spun freely. The OAG-L didn’t come with an allen key to tighten the set screws for the focuser ring. I found one that worked in my personal toolkit but didn’t feel like I could get them as secure as I'd like.

Note: The locking screw of the camera must be tightened very tight so that it no longer wobbles.
Unfortunately I cannot integrate this OAG into my setup with the Qhy268c. The helifocal rotary wheel, which is attached to the lower side, prevents the optimal backfocus setting. The setting wheel bumps into the Qhy camera and prevents a smaller distance than 19 mm. In my case, however, 12 - 14 mm would be required.

I got this adapter for Redcat 51 setup along with Touptek Filter wheel. The OAG got attached to the touptek filter wheel perfectly well with screws, attching the Touptek guide camera was easy, setting it up to precise location for finding guide stars was also simple to perform. You can raise and lower the prism easily. It worked well with Touptek 662 camera. I was able to find stars with Redcat 51 and guide the AM5 well. The sales and service of Touptek is also amazing. The packages arrived within 4 days. Everything was taken care of, even the customs. Very Satisfied.