✅ Product Description: Keep your optics clear and performing at their best with the Dew Heater Strip for 9–10” telescopes by R-Sky. Specifically engineered for larger optical tubes, this heater delivers consistent, even warmth to prevent dew and condensation during extended observation sessions. Ideal for advanced Schmidt-Cassegrain, Maksutov-Cassegrain, and astrograph designs, this heater is essential for astronomers operating in high-humidity environments. 📌 Best fit for optical tubes with front diameters from ~9” to 10” (230–255 mm).