ZWO UV/IR Blocking Filter - 1.25" tilt adjuster Glass surfaces such as telescope

Glass surfaces such as telescope lenses pointing to the clear sky are prone to having dew forming on the lens during the night - especially if its humid

dew heaters will also be required

If you already own a DSLR and want to take long exposure deep sky astrophotography then a Star Tracker is a must have item

which would otherwise disrupt and detract from observing enjoyment

ZWO UV/IR Blocking Filter - 1.25" tilt adjuster Glass surfaces such as telescopeThis filter blocks out ultraviolet and infrared light which improves the imaging and viewing on many telescopes. This is especially useful for camera sensor chips that have no UV protective AR glass and are sensitive to UV and IR light. The filter is used for luminance imaging and for Moon and Planet images. Infrared or IR light is invisible to the human eye, and so even though most telescopes are not designed to focus IR light, it does not matter