https://www.amazon.com/gp/product/B07KF57C5K
I like it reasonably well, but I find the 20x lens it comes with to be a little too zoomed in. It'd be nice to have one that matches the other eyepiece in my binocular head. This would be nice because I could look through the lens and get things positioned for the camera. Right now, the focus is different for the 10x eyepiece and the 20x one. So if it's in focus in the 10x eyepiece, it's out of focus in the camera.
What I'm wondering is if you can find 10x eyepieces that have a head wide enough to fit in this adapter. The eyepiece it comes with is 33mm at the top (the part that jams into the adapter tightly to keep it together). It's a bit bigger than my eyepiece that came with my Olympus KHC shown in comparison:
![Image](https://i.imgur.com/mnhSGST.png)
And the 20x has a smaller diameter lens than the 10x, but I assume that's just a 20x thing. I assume if I got a 10x that fit in there, it'd cut off some of the field. But maybe it'd fill the full frame of the camera lens more?
The one that came with it also has a groove that a removable rubber ring goes around. This helps keep it firmly in the adapter.