Nebula Filter H-Beta 1.25-inch

Nebula Filter H-Beta 1.25-inchExplore 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 1. 25 inch eyepieces and filter wheels. CA Residents:

The device has an adjustable length

Junior geologists will learn about rock composition and geological processes as they witness their everyday rock finds transform into works of art

Thanks to the flat mounting head

and ExploreStars App

I have seen more beginners make the mistake of trying to do finder alignments in the dark on small

the vast majority of amateur telescopes consisted of small telescopes with primitive mechanics - barely enough to see the polar caps of Mars or the rings of Saturn

Moon filter

or a star cluster

The set also includes an adjustable tripod

Wall height 0

These have an eye-relief adjustment as well as diopter adjustment

The 62° Series eyepieces are parfocal (meaning they focus at near the same point regardless of the focal length you select) and come with a removable and foldable soft silicone rubber eyecup for the comfort of the observer