Engineered to improve the visibility of deep sky objects, this 2" H-Beta Nebula Filter from Explore Scientific features a narrow transmission curve designed to just pass the hydrogen-beta emission line from 478-496nm with 94.5% transmission. By attenuating other wavelengths, this filter helps to improve observation capabilities of many nebulae. It is an ideal companion accessory for visual observation and astrophotography applications, and will fit most standard 2" telescope eyepieces, filter wheels, eyepiece cameras, and other accessories.
UPC: 812257017232