Product 1: The 1-1/4 OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light
Product 1: Made in China
Product 1: Package Dimensions : 3.0 L x 1.0 H x 3.0 W (inches)
Product 1: Package Weight : 1.0 pounds
Product 2: Reduces brightness and cuts glare, increasing clarity of the moon, Venus, and bright double stars
Product 2: 13% light transmission
Product 2: Provides a true Color image
Product 2: Threads on to any Celestron 1.25” eyepiece