VIXEN Ultra Fast Astrograph VSD 100 F3.8

The innovative wide and flat imaging field, that covers 645 medium format cameras, and 5 elements in 5 group lens design completely eliminates a violet tint in chromatic aberration (blue halo). With an SD lens in the front objective group and an ED lens in the rear objective group, this telescope achieves superb color correction.  The blue halos around stars, that are visible in astrophotography and are hard to reduce with a 4 elements in 4 group lens design, are corrected successfully.  In addition, astigmatism and coma aberrations are corrected to an extremely high level of image quality.  The VSD 100 Astrograph Telescope comes with an aluminum storage case.

The Strehl intensity on the lens design of the VSD100F3.8 is better than that on a 4 elements in 4 group lens design by approximately 10%.  It does not decrease abruptly on stars away from the center of a photographic field.  It is ideally  suited to detect faint stars.  The image circle is as large as 70mm in diameter (60% illuminated).  The star images are as small as @ 15 microns around the corners, resulting in excellent field flatness. 

The lenses of the  VSD100F3.8 Optical Tube have the most up-to-date coatings with a result of extremely low reflectivity. These have been developed to match the characteristics of each lens element in order to avoid the deterioration of image contrast due to the increase of lens elements.  It boasts of a 99.9% light transmission at the maximum per lens surface and achieves superb images with extremely high contrast with no ghost and no flare images. (Patent pending).

VSD Specifications