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
Advantage: First, I must praise the finish, it looks very delicate, and the feeling of damping to focus is very good, the focus stroke is very large, suitable for a variety of things. 1.25 inch eyepieces, and it is also very good for DIY. Very suitable for visual starry sky, you can call the most clear star images at a 0.75mm pitch. Finally, the price is right.
Cons : not suitable for shooting SLR camera After the camera is connected, if the camera center of gravity is relatively off, the focus sheet will rotate and slide. In addition, the 0.75mm pitch provides precise focus, while also providing a very slow focus. Of course, if you like hands-on experience, please ignore this flaw.
Overview: It is a cost-effective and practical focus mount and is suitable for friends who want to see. It is equipped with an astronomy telescope with M42 thread to connect a variety of devices (0eq available in 8). Connects to Barlow Mirror with M42 etc.