to hook your camera up to your telescope, you will need this. It goes on as easy as another other lens does. Just put on and twist. The only thing i did not like was the metal on metal sound when hooking it to the t-adapter.
All in all, this is a great buy!!
Pros: small, portable, lighweight
Cons: metal on metal sound when atatching to adapter
This review was written in the old system and had content requirements that are different than reviews written today.