SkyWatcher erect-image prism for Newton optical tube. Barrel size 31.8 mm. Includes 10 mm eyepiece and extension tube 1.25". Allows terrestrial observation with newtonian telescopes.
Whiter and brighter images. Simply put, that is the benefit the Everbrite mirror coating. This exotic, dielectric, nonmetallic coating is 99% reflective across the full visual spectrum, resulting in the "whitest," most natural image available. The coating is painstakingly applied to Pyrex with a surface accuracy of a 1/10 wave flatness.
SkyWatcher 45-degree erect-image diagonal, barrel size 31.8 mm. For 31.8 mm eyepieces. Allows terrestrial observation with astronomical telescope. Not suitable for newtonian optical tubes.
Diagonal Mirror Quality For High-Contrast Images In Any Situation, From 'Planetary Observations That Deep-Sky. This Is The New Model Of Diagonal Tele Vue Standard: Uses The Same Mirror Of The Previous Model But Has The Body Of The Model Everbrite (Therefore More Robust) As Well As Having The Locking Ring In Bronze Instead Of The Screw. Reflectivity 96% .