Vixen Optics VSD100 100mm f/3.8 Astrograph Refractor

Vixen Optics VSD100 100mm f/3.8 Astrograph Refractor

Vixen Optics VSD100 100mm f/3.8 Astrograph Refractor

B&H # VIUFAVSD100 MFR # 26145
Vixen Optics VSD100 100mm f/3.8 Astrograph Refractor

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Product Highlights

  • 100mm Aperture
  • 380mm Focal Length, f/3.8 Focal Ratio
  • 5-Group/5-Element Apochromatic Lenses
  • Anti-Reflection Fully Multicoated Optics
  • 112m Objective Filter Threads
  • Covers 645 Medium Format Camera Sensors
  • Includes Three Camera Adapter Rings
  • Precision Engraved Vernier Scale
  • Focal Point Placement to 20 Microns
  • Hard Aluminum Carrying Case
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  • 1Description

The VSD100 100mm f/3.8 Astrograph Refractor from Vixen Optics is a purpose-built telescope for astrophotography and astro-imaging, with an imaging circle capable of covering up to medium-format 645 sensors. Optically, it's designed with a fully multicoated 5-group/5-element apochromatic lens system that corrects for spherical and chromatic aberrations. This correction creates a wide flat field of view without distortion and removes the blue-tinted "halo" affect for true high-contrast color transmission. Astigmatic and coma aberrations are also corrected. Front M112x1 and rear M58x0.75 threads allow the use of filters that can stay on, even if the user wants to change cameras.

The scope can be used for multiple astrophotography techniques included prime-focus, afocal imaging, or eyepiece projection. A traditional focuser is replaced by a non-rotational helical focus system which moves the drawtube forward or back to place the focal point onto the camera's imaging sensor. The vernier scale on the drawtube is engraved for durability and repeatability and enables precision measurements to as much as 20 microns. Three different size camera adapters are provided to accommodate the most common camera-specific T-rings and accessories.

Optical Performance
  • 100mm aperture
  • f/3.8 focal ratio
  • 380mm focal length
  • Apochromatic 5-group/5-element lens design corrects for spherical and chromatic aberrations
  • Views show a wide and flat field of view without distortion at the edges - spherical aberration
  • Colors are faithfully rendered by eliminating the blue "halo" effect of chromatic aberrations
  • Astigmatism and coma aberrations are also corrected
  • Anti-reflection fully multicoated optics
Imaging
  • Use for prime focus, Afocal imaging, or eyepiece projection astrophotography
  • Push fit: 60.2mm and 31.7mm
  • M84x1.0, M60x0.75mm, M42x0.75mm camera adapter threads
  • 70mm imaging circle, with approximately 60% illumination at the edge
  • Designed to cover a 645 medium format sensor
  • 58mm filter thread
Focusing
  • 89mm diameter drawtube
  • Knurled non-rotational helical focus ring
  • Focus ring lock sets drawtube in place
  • Precision vernier scale on the drawtube for exact focal point placement to 20 microns
  • Vernier scale engraved on drawtube for durability
Construction Details
  • Anodized aluminum optical tube
  • 1/4"-20 tripod mount
  • M112x1 objective filter thread
  • Hard aluminum carrying case
In the Box
Vixen Optics VSD100 100mm f/3.8 Astrograph Refractor
  • 3 x Photo Adapter Rings
  • 1.5mm Allen Wrench
  • Hard Aluminum Case
  • Limited Five-Year Warranty
  • Table of Contents
    • 1Description
    Optical Design Refractor
    Aperture 100 mm
    Focal Length 380 mm
    Focal Ratio f/3.8
    Eyepiece Barrel Diameter 1.25"
    Diagonal None
    Finderscope None
    Tripod None
    Mount Type Vixen dovetail plate
    Optical Tube Dimensions 19.6 x 4.5" (49.7 x 11.5 cm)
    Weight 9.9 lb (4.5 kg)
    Packaging Info
    Package Weight 20.55 lb
    Box Dimensions (LxWxH) 24.6 x 11.0 x 10.4"

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