
Before I bought this ring I was afraid that it wouldn't be made of good materials, especially after reading reviews that it doesn't lock can be the camera body. what i got is a really great product and together with the celestron t adapter i ordered it does the job perfectly. The ring snaps nicely into the body, but first you need to get it in place properly, as the EF lens has a small hole on the side of the ring that faces the red dot on the Canon camera body. If you then turn the ring clockwise, it clicks into place without a problem. My camera is a Canon600D, my telescope is a Celestron SkyProdigy 130. The only problem is that I cannot focus the image even after removing the ring and T-adapter and eyepiece holder from the telescope's focuser, the focus in my telescope is still far away from the sensor of my Canon. I knew from the start that this was going to happen and it could be solved by putting a Barlow lens between the telescope and my camera, but as I'm still waiting for my Barlow lens to be cleared by customs I can A full review won't tell you, but if your telescope is going to be used as a scope for astrophotography, this is the best, most reliable triple ring you can find on the market

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