M68 EXTENSION TUBE - 15mm William Optics The large rack and pinion

The large rack and pinion 3" focuser can be rotated 360° to perfectly frame the subject and has a reduction gear of 10:1 for precise focusing

William Optics Flat68III

2 per side

An ideal equatorial mount has its right ascension axis pointed directly at the celestial poles

25″ Super Plossl 10mm (190x) – apparent field of view 52°

M68 EXTENSION TUBE - 15mm William Optics The large rack and pinionThis 15mm M68 extension tube features a male M68 x 1 thread on one end and a female M68 x 1 thread on the other. This is a very useful accessory for making up the exact backfocus distance required by correctors. Specifications Connection side A Male M68 x 1 Connection side B Female M68 x 1 Optical length 15 mm SKU AX M68 EXT15