Feature

●Interface Size: 1.25" (about 31.7mm)
●Focusing stroke: 1.3 inches (32
●Single turn stroke: 0.75mm
●Length: 60mm when concentrated, 92mm longest for focus
●Connecting Method: One end is a universal 1.25" interface (used to connect eyepiece) and the other end is universal M42 thread (used to connect telescope or other equipment)


Description

Thread specification: M42*0.75mm
Interface Size: 1.25" (about 31.7mm)
Focusing stroke: 1.3 inches (32
Single turn stroke: 0.75mm
Length: 60mm when concentrated, 92mm longest for focus
Connecting Method: One end is a universal 1.25" interface (used to connect eyepiece) and the other end is universal M42 thread (used to connect telescope or other equipment).
Screw Material Lock: Stainless Steel
Sleeve Material: Aluminum Alloy
Surface treatment: chemical blackening (non-spray paint, blackening is much stronger than spray paint)
Color: Black
Net Weight: 3.6 oz (103 g).
Total Weight: 4.1 oz (113 g).
This is a spiral focus sleeve that can be used to:
1. Connect to telescope as a fine focus seat.
2. Astronomical telescope extension tube
3. Focus and DIY Telescope