Castell Ortho 10,5mm

 The orthoscopis eyepieces provide the best theoretical image quality close to the optical axis. Almost no field curvature, no spherical and colour aberrations, negligable reflections and extremely high contrast. A popular design for lunar, planetary and binary star observations.

The Castell Ortho eyepieces are classic 4-element ortho eyepieces with multicoatings on all glass-air surfaces. The field of view is slightly wider, reaches 50°, meaning better comfort for observing the Moon. The 1.25\" eyepieces have standard filter threads.