M68 VARIABLE EXTENSION 15 - 18mm IR-Pass 30A064BK (black)

30A064BK (black)

The sensor has a maximum QE up to 91%

The Focuser is capable of lifting 40 lbs (18 kg) with a range 30 mm (30000 microns)

its oversized secondary mirror provides a large illuminated field that is ideal for large camera sensors

Newtonian 250 f/5

M68 VARIABLE EXTENSION 15 - 18mm IR-Pass 30A064BK (black)This variable length adapter consists of a male M68 x 1 thread on one end and a female M68 x 1 thread on the other. Optical thickness of the adapter can be adjusted between 15 18mm. This is very useful for connecting accessories such as filter drawers or filter wheels to correctors which require a very specific backfocus distance. Specifications Connection side A Female M68 x 1 Connection side B Male M68 x 1 Optical length 15 18 mm SKU AX M68 VAR