Welcome to the section dedicated to astrographs: high performance optical tubes for high quality astrophotography.
Ultra-fast VSD100mm F/3.8 Vixen astrograph. Optical design: 5 elements in 5 groups, optimized for 70mm corrected wide field digital shooting. See the VSD100 dedicated web site for details and technical specifications: http://www.skypoint.it/vixen/vsd
The Vixen Vc200L, Known As Visac (Vixen 6Th Order Aspherical-Cassegrain) Is A Catadioptric Optical Design With A Unique, One Of The Most Sophisticated Currently Available. It Has A Primary Mirror With Aspheric Surface Of The Sixth Order, A Mirror And A Convex Secondary Triplet Of Corrective Lenses.
Vixen's AX103S, F/8.0 Refractor features a three element objective lens, incorporating a central ED lens. This reduces chromatic aberration and yields high contrast images. In combination with the rear Field Corrector Lens, the AX103 Refractor yields clear images to the edges of the field of view.
The Refractor Np127Is Sets A New Standard For Optical And Mechanical Quality For The Scrupulous Observer And The Astro Demanding. The Telescope Preserves The Specific Optical Pattern With One Nagler-Petzval 4-Element Which Is Improved For What Concerns The Correction Of The Coma, Astigmatism, Field Curvature, Secondary Spectrum, The Spherical Aberration...
SkyWatcher Esprit 150ED F/7 triplet flat-field apochromatic refractor features right angled erect image finder scope, 3" focuser, 2" diagonal with 1.25" adapter.