having a wonderful new 12" Skywatcher dob in my hands, I bought recently a Hotech self-centering laser collimator. It is proven to work very well, but by mistake I took the 1.25" version not the 2" version, so I don't have the SCA self centering adaptor for the 2" focuser.
I'm thinking about returning the collimator but I'd like to understand if there are workarounds since it appears to be not available on the provider site.
What the SCA 2" to 1.25" adaptor does is to self centering radially towards the 2" focuser tube, which helps to reduce the misalignment of the laser collimator in the focuser tube; the same does the 1.25" collimator towards the adaptor.
now my questions:
1. knowing that the 1.25" hotech collimator is self centering, if I use a normal 2" to 1.25" adaptor, will this be enough precision to collimate the Dob?
2. are there any 2" to 1.25" adaptors with external self-centering capability (radially towards the focuser tube) not just internal (standard feature)
Maybe I'm worrying too much here since the error induced by the 2" misalignment in the focuser is less than the one induced by the 1.25" misalignment, but if i can avoid to return the 1.25" Hotech collimator and get a sufficient precision, it would save me some time and money.
Thanks a lot