Omegon Flexible Dew Shield 4 inch (115 to 135 mm)

Omegon Flexible Dew Shield 4 inch (115 to 135 mm): prevent condensation on 4-inch optics

A perfectly aligned telescope is worthless once the optics fog up. This flexible dew shield extends the tube past the lens or corrector plate, causing it to lose less heat to the open sky and condensation to occur much later or not at all.

Velvet on the inside

The interior is lined with black velvet. This suppresses stray light from streetlights and the moon, and at the same time slows down the cooling of the optics. So, a double win: more contrast and less dew.

Rollable and adjustable

The flexible plastic can be rolled up, allowing the dew shield to pack compactly in your suitcase. The adjustable Velcro closure secures it firmly around the optical tube without scratching and accommodates small differences in diameter.

Featured accessories

Please note the sizing: the inch designation refers to the optics the cap is intended for, and the millimeter range is the outer diameter of the tube. Measure your tube before choosing.

For whom yes and for whom no

• ✓ Owners of 4-inch refractors and Maksutovs
• ✓ Observers at humid locations
• ✓ If you are affected by stray light
• ✗ Newtonians: they have an open tube and require a different approach
• ✗ Anyone already using a heated dew strip: that is more effective against heavy dew

Specifications

You can find more accessories for this brand at the Omegon brand page.