Vixen 5831 VMC260L Optical Tube Assembly only for SXD mount

by VIXEN

Product Details

• Product Dimensions: 37 x 21 x 18 inches ; 37.7 pounds
• Shipping Weight: 39 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B000Y1W0N0
• Item model number: 5831
• Date first available at Amazon.com: November 1, 2008

Product Description

From the Manufacturer

One of the largest commercially produced Modified Cassegrains with outstanding resolution, designed to mount on Vixen’s Sphinx SXD Mount.

Like the popular Schmidt-Cassegrain, the Japanese made Vixen VMC260L is a true all purpose telescope. Despite its long focal length, the tube is only about 650mm (20") long. As a result the instrument is very portable.

Light coming from the left is reflected off the primary mirror (f/2.5) and then hits the corrector plate in front of the secondary. This correcting lens is responsible for the large usable field of the VMC. The meniscus correcting lens offers a large corrected field. With the optional reducer you get shorter exposure times. You can take photos both through the telescope and using a telephoto lens parallel to the main instrument, or you can use the VMC260L for guiding while the camera sits on top.

Specifications

• 26mm Aperture
• f/11.5
• 60mm Threads
• Weight: 22 lbs

Product Description

Vixen's unique catadioptric design features a high precision sixth order aspherical primary mirror, a convex secondary mirror and triplet corrector lens. VISAC is an abbreviation for Vixen's Six-Order Aspherical Cassegrain. The primary mirror is held by a retaining ring, instead of hooks to decrease flare and enhance constrast. The VC200L is an 8" f/9.0 highly corrected, highly specialized telescope for astro imaging. The VISAC provides high-definition star images to the edge of a wide viewing field and offers exceptionally outstanding performance in astrophotography. Even at the edge of the 35mm film format (larger CCD chips) stars are sharp (smaller than 15 micrometers). This is smaller than the resolution of fine quality CCD cameras, which means that the telescope does not limit the image quality. With its eleborate aspherical optical design it achieves an excellent image correction throughout the large illuminated field (42mm diameter fully illuminated). With the f/6.4 reducer you get much shorter exposure times. The reducer is a highly recommended optional accessory. The basic configuration includes a pigge-back camera holder. You can take photos both through the telescope and using a telephoto lens parrallel to the main instrument or you can use the VC200L for guiding while the camera sits on top.