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VIXEN VSD100 F/3.8 Super Wide Refractor Telescope - AstroShop

 

THE DREAM WIDE FIELD REFRACTOR
Pinpoint Stars Right to the Edge of the FoV
VIXEN VSD100 F/3.8 Astrograph Apochromatic Refractor
the worlds finest in its class for amateur astronomers and professional photogrpahers
 

Ultra Fast Refractor for Astrophotographers featuring a 5 Elements in 5 group lens design. This f/3.8 OTA is Optimized for Digital Imaging

Another superb Vixen telescope designed and manufactured in Japan. This beautiful astrograph refractor yields high contrast images, excellent colour correction and field flatness perfect for visual and astrophotography alike. Vixen’s goal was to develop a process to outperform the views from a premium photo lenses. The result is the introduction of MTF (Modulation Transfer Function), previously used for evaluating the optical performance of camera lenses. Thus, it allows for a more precise evaluation of the photographic performance as compared to conventional spot diagrams. This is a new direction in the choice of an astrograph.

The innovative wide and flat imaging field, that covers 645 medium format cameras, and e 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 scope achieves superb colour 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 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 centre 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 have the most up-to-date coatings of extremely high 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.
Objective design: SD Apochromatic
Lens elements: 5 elements in 5 groups (one SD lens and one ED lens)
Effective aperture: 100mm
Focal length: 380mm
Aperture ratio: 1:3.8
The VSD100F3.8 has an oversized focuser that can be attached to the 645 medium format cameras without difficulty. Highly accurate focusing is possible with the non-rotational helical fine focuser, where the distance of drawing in and out the focuser can be read as small as 20 microns with the provided vernier scale. All the graduations are engraved.A focal reducer (0.79x) with the optical design of 3 elements in 3 groups and a tele-extender (1.58x) with the optical design of 4 elements in 3 groups will be available as optional parts. With the use of these optional accessories, the VSD100F3.8 can be transformed to an even faster astrograph with 300mm in focal length at
F3.0, or can be converted to a more multi use optical tube with 600mm in focal length at F6.0 for observing planets and other celestial objects.

Vixen has initiated a new project in each stage of their manufacturing process to ensure that better quality is realized in the high performance as designed. In the process of manufacturing optical glass, all the five lens elements are annealed with a precision annealing process. (The annealing can straighten molecular arrangements of lens elements and thus unify the characteristic of optical glass.) The homogeneity of refractivity in optical glass is enhanced to the highest degree.

In addition, Vixen introduced a premium Zygo Verifier ATZ laser interferometer for accurate measurement of optical components. The Zygo Verifier ATZ has a 1000 x 1000 pixel digital camera for high resolution metrology that can accurately identify sudden changes of a form on the optical surface of lenses. Any irregularities on the lenses can be inspected individually. This provides an in-depth control of the lens quality which was never realised previously.


INITIAL RELEASE CUSTOMER TEST IMAGES

 

Orion region captured with Canon EOS 6D DSLR and Vixen VSD100 f/3.8 wide view refractor
The above image of the nebulous region of Orion taken with a basic Canon EOS 6D camera with the Vixen VSD100 f/3.8 refractor mounted on Vixen SXD2 German Equatorial mount.
Click here to see larger version
IC1805_1848 region with Vixen VSD100 f/3.8 wide view refractor

M3 NGC2174-5 and IC443 with Vixen VSD100 f/3.8 refractor

 

Optional Focal Reducer and Optional Tele-Extender

A focal reducer (0.79x) with the optical design of 3 elements in 3 groups and a tele-extender (1.58x) with the optical design of 4 elements in 3 groups are available as optional parts.
With the use of these optional accessories, the VSD100F3.8 can be transformed to an even faster astrograph with 300mm in focal length at F3.0, or can be converted to a more multi use optical tube with 600mm in focal length at F6.0 for observing planets and other celestial objects.

Click here for FAQ sheet PDF

Click here for review from Astronomy Magazine

Special Order the Vixen VSD100 F/3.8 refractor now


 
Note: AstroShop reviews are only intended to provide prospective purchasers our own first hand impressions of performance and build as has been our long time policy.
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