DSLR adapter size for Big Barlow
2 replies to this topic
Posted 22 March 2019 - 11:08 PM
I’m looking to attach my Canon EOS to a 8inch dob, using a Big Barlow. I see that there are two types of single piece adapters available (one having a 2-inch bore to fit directly into the Big Barlow and the other being 1 inch bore and needing the bushing to fit). There is about a $70 cost difference between the two. Does the larger diameter have any benefit in this setup, or will the light path fit through the 1inch bore without obstruction?