Nebula Filter H-Beta 2.0-inch Optical Design_Newtonian Available custom sizes Mens: 2XL

Available custom sizes Mens: 2XL

Wide 42-inch footprint

Description

jewelry and artifacts by alerting you to metals buried up to 8 inches below the surface and providing critical information about these finds using tone alerts and identifiers on the LCD screen

Discover the inner beauty hidden inside common rocks with the Explore One Rock Tumbler that mimics natural weathering processes

Nebula Filter H-Beta 2.0-inch Optical Design_Newtonian Available custom sizes Mens: 2XLExplore 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.