I've got 2 scopes with the GSO 10:1 focuser fitted. The one on the 4" refractor is good, very smooth and no sag but found I had to mount the one on the 6" reflector upside down, (focus knobs on top), as the weight of the Canon 300D did cause a sag if it was mounted the other way. Pretty good value for the money overall though.
Bill
|