GSO ELLIPTICAL SECONDARY MIRROR 88mm Ring Length of the M69 thread

Length of the M69 thread

Here’s some examples

flange with 6 x M3 screws Trig function Hardware Trig-In socket (RCA type)

5 through 24 inches)

The SkyWatcher 6" Dobsonian is a Newtonian reflector telescope with an f/8 focal ratio

GSO ELLIPTICAL SECONDARY MIRROR 88mm Ring Length of the M69 threadThe GSO 88mm elliptical secondary mirror is ideal for amateur telescope makers and is perfectly suited to the Geoptik Nadirus 16" Dobsonian. GSO secondary mirrors are offered in sizes from 62. 5 88mm to suit a variety of primary mirrors. Well known for their excellent quality, GSO mirrors are some of the best available in their price range. The secondary mirror does not come with a holder, but can be glued in place. The mirrors are made from BK 7