The 100 mm Ultima offers more than 50% brighter images than the 80mm, allowing for better performance in low light conditions. The 100 mm refractor features excellent multi-coated optics packed into a portable and durable refractor design and comes standard with a 22-66x zoom eyepiece.
Product Title: Celestron Ultima 22-66 x 100 Refractor Spotting Scope
Objective Diameter: 100mm
Compatible Device: Spotting Scope