This Farpoint FP336 dew shield for the Celestron 4-inch and 4SE SCT is a precision-sized flexible dew shield, also fitting compatible small refractors and Maksutov telescopes. It slips over the front of your OTA in seconds, slows radiative heat loss from the front optic, and keeps dew off your lens or corrector plate through long observing sessions.

Fits These Telescopes

Tube outer diameter: 4.64″ to 5.12″ (118–130 mm)

• Celestron SCT & Mak: NexStar 4 SE, AstroMaster 90 AZ/EQ
• Celestron 102mm Refractors: NexStar 102 SLT Refractor, Omni XLT 102 (4″ Refractor)
• APO Refractors: Apertura 90mm FPL-53 Triplet APO, Sky-Watcher Esprit 80mm ED APO, Explore Scientific ED80 80mm Carbon Fiber APO

Why You Need a Dew Shield

The front of your telescope radiates heat directly into the cold night sky. Once the front optic drops below the ambient dew point, moisture condenses on it — blurring your view and ending your observing session. A dew shield extends the tube to create a buffer of still air in front of the optic, dramatically slowing heat loss.

The Farpoint flexible dew shield is the simplest and most effective dew prevention tool you can own — no power required, no batteries, no warming straps. Just slip it on and observe.

Built to Last

• ABS polymer construction — durable, UV resistant, virtually indestructible
• Black felt lining — kills stray light reflections, won’t scratch the front optic
• Hook-and-loop closure — wraps tightly, removes in seconds, stores flat
• Precision-sized to the casting — not a generic one-size tube