....It works great...no complaints.... Quality and price is the reason I chose to order from OPT.
Worked great with Mercury transition (11/11/'19).
I am about to order my second of these . I use it on a 12inch SCT with a Stellacam3, for the last 2 years. I have no edge issues or otherwise. I can say I am very pleased with the one I have, just would like another one in case something were to happen to this one .
My only issue with this product is the coma - it's pretty significant - generally I found myself cropping off the outter 20-30% of the image (752 X 582 cropped down to about 640x480 typically to trim off the worst of the coma. That being said, focal reducers typically exhibit better/worse coma depending on distance from the sensor. W/o a variety of different length nosepices for the DSI II, i could not experiment with varying the distance - it's possible there is a distance which eliminates this coma. I'd really like to see some tests because having a nosepiece focal reducer on the DSI II would be awesome.
Bad coma when used with Meade DSI Pro II. I would not use it capture images. It may have some use for guiding though. It does widen the FOV in case a good guide star is out of the imager's normal FOV.