Do you want precise, accurate focusing of your Off Axis Guide camera, with the NEW ZWO 1.25″ Helical Focuser you can achieve perfect focus with finger tip ease.
Manufactured from Aerospace Aluminium Alloy Material using precision CNC Machining Technology the ZWO 1.25″ Helical Focuser features:

• Frosted and Anodised Housing
• Anti – Skid Brass Screw

Design for use with the ZWO OAG and Mini Series Guide cameras.
Can also be used in other situations where precise focus is required

ZWO 1.25″ Helical Focuser Specifications:

Inner Diameter: 1.25inch (31.7mm)
Stroke: 6mm
Top Male Thread: M42 x 0.75 (T-Thread)
Bottom Female Thread: M42 x 0.75 (T-Thread)
Minimum Height: 48.5mm