M68 EXTENSION RING 8mm Bar Tube diameter

Tube diameter

It can be also used as conversion ring from male to female thread

The SE grade meet the critical DayStar quality control criteria applicable in all visual and some photographic environments

The majority of telescope mounts employ a worm drive gear system

M68 EXTENSION RING 8mm Bar Tube diameterThis 8 mm extension ring is often used for professionals filed flattener such as the SharpStar 2. 5" field flattener. This extension ring has a M68 x 1 male thread on one side and a M68 x 1 female thread on the other side. The total thickness is 12 mm and it includes the 4 mm male thread Specifications Connection (side a) M68 x 1 male Connection (side b) M68 x 1 female Optical thickness 8 mm (not including 4 mm male thread) Clear aperture 63 mm SKU