Astromania USB Dew Heater Strap Size:40CM for 80mm Telescope This narrowband filter therefore blocks

This narrowband filter therefore blocks everthing with the exception of the spectral range in which a lens optic works most sharply and with the highest contrast

so this item is for in-store pickup only

NEED BOTH FILTERS

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

Astromania USB Dew Heater Strap Size:40CM for 80mm Telescope This narrowband filter therefore blocksLens 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