Used Explore Scientific 62 degree Argon-Purged Waterproof Eyepieces Focal Length:26mm attach an H-Alpha solar filter

attach an H-Alpha solar filter and observe the roiling surface of the Sun directly along with tracking the daily changes in stormy prominences

The William Optics Ultra-Cat 108 is a cutting-edge 108mm apochromatic refractor designed for astrophotographers who demand top-tier performance

with a focal length of 714 mm

allowing the secondary mirror to be removed and replaced with a third party lens accessory for ultra-fast f/2 wide field imaging

Used Explore Scientific 62 degree Argon-Purged Waterproof Eyepieces Focal Length:26mm attach an H-Alpha solar filterConditions: These are used Explore Scientific 62 degree 1. 25" and 2" eyepieces in excellent condition. The optics and bodies are clean. Any dust you see in the photos is easily removable. NOTE: The 5. 5mm eyepiece optics have smearing as shown in the provided photos. We have adjusted the price accordingly. Description: Features Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable