Please read the link from Lumicon,
Quote.
Note: Refractor telescopes require the use of a 2" Filter Selector/Diagonal combo, either the LD3015 or LD3025, to reach focus. Newtonians must be set up for photography to reach focus.
I was interested in this piece of equipment till I read this.
I hope this helps.
No disrespect to the seller intended.
Cheers
