Nebula Filter H-Beta 2.0-inch focusers Includes a precision 2" rack-and-pinion

Includes a precision 2" rack-and-pinion focuser with extension tubes and a pre-installed Hybrid Finder Scope Base

and screw it in

Weight 7oz

In this autobiography Mike provides a very personal story of his journey through the Universe

but not the brightness of the fog itself

Nebula Filter H-Beta 2.0-inch focusers Includes a precision 2" rack-and-pinionExplore Scientific Nebula Filter 1. 25" H Beta Range from 478nm to 496nm with peak at 489nm. Transmission 94. 5% H Beta Hydrogen is the most abundant element in the universe and many nebulae glow in the light of H beta. This line filter blocks all other wavelengths (and thereby nearly all of the artificial light) and only the emission line of hydrogen beta will pass. This filter fits all standard 2. 0 inch eyepieces and filter wheels.