Bahtinov Mask For Telescopes 120 To 160mm Acrylic No Nonsense Focusing Tool Manual Focus Accessory Black Fits Dobsonians Mak Cas Refractors Easy Focusing For Sharper Star Images And Precise Focus

Bahtinov Focus Mask for 120-160mm Telescopes, Acrylic
✔️ Acrylic mask, 2 mm thick, fits 120-160 mm tubes, 3 metal posts

This acrylic Bahtinov mask is a handy manual focusing tool for telescope users, designed to speed up achieving sharp star images. It fits a range of telescope types including Dobsonians, Maksutov-Cassegrains, and refractors by using the three-post mounting to stay centered without upsetting balance.

✅ Material: Acrylic, approx. 2 mm thick
✅ Outer diameter: 120-160 mm (4.7-6.3 in) tubes
✅ Three metal posts with silicone covers to prevent scratching and ensure centering
✅ Lightweight design to avoid upsetting telescope balance
✅ Package includes 1 mask and 3 mounting accessories

💡 What is a Bahtinov mask used for in astrophotography focusing?
A handy, practical explanation follows.

- Diffraction spikes guide you to the sharpest focus on stars. - Works across Dobsonian, Mak-Cass, and refractors in the 120-160 mm range. - The three-post mount keeps the mask centered without upsetting telescope balance. - Great for both astrophotography and visual observing. ✝️