Refractor-Achromat

Celestron Omni XLT 102 Refractor Optical Tube Info:   Optical Design: Refractor Aperture: 102mm (4.02") Focal Length: 1000mm (39") Focal Ratio: f/9.8 Focal Length of Eyepiece 1: 25mm (0.98") Magnification of Eyepiece...

Celestron Omni XLT 120 Refractor Optical Design: Refractor Aperture: 120mm (4.72") Focal Length: 1000mm (39") Focal Ratio: f/8.33 Focal Length of Eyepiece 1: 25mm (0.98") Magnification of Eyepiece 1: 40x Finderscope: 6x30 Mount...