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Volver a la TiendaAstrophotographers generally use two different focal lengths: short focal lengths for general photography and large deep-sky objects, and long focal lengths for objects that are farther away.
Japanese aspherical mirror optics offer the perfect solution for these scenarios.
The Vixen VISAC (Sixth-Order Aspherical Cassegrain) primary mirror is specifically designed for astrophotography and provides a completely flat, true-color image across the entire image frame. Thanks to the three-element field corrector in front of the convex secondary mirror, there is no spherical aberration, coma, or field curvature. Although the device is designed for astrophotography, it is also suitable for visual observations.
What’s included:
Focal length of 1800 mm
Photographically optimized thanks to the field-flattening lens for a full-frame sensor.
Short design, lightweight housing, and open tube.
Revolutionary coating technology.
High light-gathering power
. Includes: 7×50 spotting scope with flip-up mirror and carrying handle.
Cassegrain reflector of optical design corrective by APO meniscus in front of the secondary mirror. Longitudinal or Spherical aberration and Coma (or Petzval effect) corrected 100%
Maximum recommended magnification 400
Mirror/lens diameter 200mm
Focal length and aperture ratio 1800 mm f/9.0
Angular resolution 0.58 arc seconds
Focusing system 2″ rack and pinion focuser
Eyepiece barrel diameter 31.7 mm
Visual limiting magnitude 13.3 (approx., mag)
Viewfinder 7×50 viewfinder, illuminated
Dimensions and weight 232 mm x 600 mm Weight: 6.9 kg