M68 EXTENSION RING 5mm Saxon using DayStar Filters' Fabry Perot

using DayStar Filters' Fabry Perot etalon technology

The 95mm PLUS support rings are designed for optical tubes with a diameter of Ø95mm

If you need to compensate the small misalignment in the imaging train

Photographically

Watertight rubber seal around the lid

M68 EXTENSION RING 5mm Saxon using DayStar Filters' Fabry PerotThis 5mm extension ring is often used for professional field flatteners such as the SharpStar 2. 5" field flattener. The extension ring has an M68 x 1 male thread on one side and an M68 x 1 female thread on the other side. The total thickness is 9mm which includes the 4mm male thread. Specifications Connection (side a) M68 x 1 male Connection (side b) M68 x 1 female Optical thickness 5 mm (not including 4 mm male thread) Clear aperture 63 mm SKU