M68 SPACER SET 0.15 - 1mm T ring 5x extender focal ratio F/14

5x extender focal ratio F/14

so cannot be used with any other telescope model

25" & 11" Schmidt-Cassegrain telescopes offers an easy and effective solution to safely transport your telescope OTA

Optical thickness is just 2mm

Straight-through (S52

M68 SPACER SET 0.15 - 1mm T ring 5x extender focal ratio F/14The 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