M68 SPACER SET 0.15 - 1mm T ring 7 kg (28 lbs) excluding

7 kg (28 lbs) excluding counterweight Mount weight

so cannot be used with any other telescope model

5x extender focal ratio F/14

they aren’t extremely accurate anyway

DSD 245mm Vixen-style dovetail in Black for a more secure connection to the mount

M68 SPACER SET 0.15 - 1mm T ring 7 kg (28 lbs) excludingThe M68 spacer ring set is useful for fine tuning the precise backfocus distance as required by correctors, as well as preventing binding between two M68 threaded parts. This set comes with nine rings of various thicknesses between 0. 15 and 1mm. Specifications Optical length 0. 15, 0. 2, 0. 3, 0. 4, 0. 5, 0. 6, 0. 7, 0. 8, 1 mm Weight 10 g SKU AX M68SHIM0. 15 1. 0