[Suzy]

Hi everyone,
As some of you'll know, I have recently purchased a 10" dob, but my 2 inch barlow doesn't fully fit into the focuser (there is silver showing on the barlow, that should normally go fully in (did in my last 6" dob). There is a step inside the focuser on the tube which doesn't allow the barlow to go in any further.

I have concerns about the performance ability so I rang the store from where I got it from, and he said that's normal, perfectly fine and will not affect the image providing the screws lock it in (which they do).

I was wondering if this is in fact normal and nothing to worry about. Hubby is annoyed and can't see how this won't affect the image, and wants to machine it down.

Thank you for taking the time to help me,
Suzy.