M68 EXTENSION TUBE - 15mm William Optics 2 per side

2 per side

William Optics Flat68III

Oxygen-III and Sulphur-II narrow-band filters boost the contrast of emission nebulae and supernova remnants for professional results

The PE grade series is designed for professional research studies and applications in which precision homogeneity and on-band transmittance values across the substrate surface are required

The Prima Luce Lab Losmandy dovetail for 9

M68 EXTENSION TUBE - 15mm William Optics 2 per sideThis 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