KineOptics Focuser HC-1 Helical Crayford 1,25" (65756)

Helical focusers have traditionally been used as a solution for low-profile Newtonian focusers, but they often come with challenges such as slop in the threads and slow travel rates that hinder precise focusing. Most helical focusers rely on a single thread, limiting travel per turn to approximately 0.125 inches. While using multiple lead threads can slightly improve travel rates, it still falls short of optimal performance.

The Helical Crayford design addresses these issues by offering a faster travel rate, smooth operation, and backlash-free performance in a lightweight and simple design. Additionally, the HC-2 model eliminates the need for grease, ensuring it remains functional in cold weather and avoids attracting debris like bugs. Below are the detailed specifications for the Helical Crayford Focuser.

Specifications

Capacity:

• Eyepiece Connection: 1.25 inches

• Draw Tube Travel: 25.4 mm

Connection:

• Screw Thread: Yes

General Information:

• Height: 19 mm

• Material: Stainless steel

• Weight: 62 g

Type:

• Focuser Type: Helical

• Build Type: Helical