Bahtinov Focus Mask For Telescopes Acrylic Focusing Mask Fits Tube OD 120mm To 160mm A Must Have Accessory For Dobsonian Refractor Mak Cassegrain Or Any Telescope Great For Quick Accurate Focus Every Time
✔️ Includes 1 mask and 3 mounting posts for a secure 120-160mm fit
A quick, lightweight focusing aid designed for most telescope tubes. It works great on Dobsonian, refractor, Mak Cass, and other scopes, helping you nail sharp focus quickly and reliably.
✅ Material: acrylic, approx. 2mm thick
✅ Weight: approx. 46g (1.6oz)
✅ Outer diameter support: 120-160mm / 4.7-6.3in
✅ Three mounting posts with silicone covers for slip-free centering
✅ Lightweight design minimizes balance impact
💡 What is a Bahtinov focus mask used for in telescope focusing? This handy tool helps you dial in precise focus quickly across a range of telescope types. - handy for quick, precise focus adjustments in the field - works with 120-160mm tube diameters for many popular scopes - three-post mounting for centered, slip-free alignment - lightweight acrylic design that minimizes balance impact
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