Astronomy Specialist

M68 EXTENSION RING 5mm

$99.00

Quantity
- +

This 5 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 9 mm and it includes the 4 mm male thread


 

Thread

M68 x 1

Optical thickness

5 mm (male thread not taken into account)

Length of the male thread

4 mm

Clear aperture

63 mm

 

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