2" Filters

Lumicon's Night Sky Hydrogen-Alpha Filters are long-pass filters with a 50% transition from blocking to passing at about 640nm. At wavelengths longer than 650nm, transmittance is 90% or above

The Lumicon 2" Lunar & Planetary Filter Set, LF5050, is an excellent, general-purpose set of four (4) of Lumicon's most popular 2" lunar and planetary filters

Lumicon Minus Violet and Infrared Blocking Filters are used primarily to "bracket" the color-corrected band of refracting telescopes.

Levenhuk Ra H-Beta 2'' filter is used for observations of deep-sky objects, such as emission nebulae (H II) and others.

The Baader Planetarium UHC-S Nebula filter excels at delivering a high-contrast and natural view of emission nebula - without excessive dimming and loss of background star fields.

Much more than a simple minus-violet filter. Based on the popular Baader Moon&Skyglow filter, the Baader Contrast-Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter

This 2" UHC filter is made with less expensive glass than Astronomik's high-end UHC filter, but is of higher quality than other economy UHC filters on the market.

The Astronomik UV and IR cut Filter is great for for digital photography!

The Astronomik 2" IR Blocking Filter is an infrared-blocking filter for digital photography.