- eyepiece barrels
- brand adapter
William Optics RotoLock Adapter - Red
Worked as advertised perfect!!!
I now have two of these. This one works more smoothly than the first one and is perfect. The design is very clever and much better than a different brand adapter that I have. The retaining ring is split into two separate pieces which allows for secure gripping on all types of eyepiece barrels. Very pleased with this adapter!