Astromania USB Dew Heater Strap Size:40CM for 80mm Telescope The balanced transmission allows color

The balanced transmission allows color photographs to be taken with minimal color cast to broadband emission objects such as stars

5 on unwanted wavelengths from light pollution

Hydrogen-alpha

locking eye-guard is included for those who don't wear eyeglasses

Astromania USB Dew Heater Strap Size:40CM for 80mm Telescope The balanced transmission allows colorLens Heating protects the lens of your camera or telescope before freezing and fogging. Adjustable sizes suitable for most smaller telescopes and camera lenses Stepless temperature regulation: This product is equipped with a stepless temperature regulation controller; by sliding the knob on the controller; you can adjust the temperature according to different needs USB 5V power works with ASIAIR and any USB power bank. Available in two lengths: 25mm