All our other accessories -Telescope Eyepiece 1. 25" 3X Barlow Lens for Celestron Color Filter Highlights generic brand Telescope Eyepiece 1. 25" 3X Barlow Lens for Celestron Color Filter Description: Universal 1.25 Telescope Eyepiece inch / 31.7 mm Barlow Lens 3X M42 Thread and Color Filter Set of 4. Perfect for the moon, deep sky objects and any other observation of the planet's surface. Fully multi-coated optical glass for clear vision. M42x0.75mm thread, connect DSLR camera via T-ring adapter. Color filter, help prevent glare and improve object contrast. Specification: Eyepiece Material: Optical Glass+Plastic Magnification Factor: 3X Lens Coating: Multi-layer Film Thread: M42x0.75mm Length: 7cm/2.8inch Filter Material: Metal Size: 30mm/1, 18 inch Color: red/green/blue/yellow Package includes: 1x 3X Barlow lens 4x color filter