Autorizēties
Wiliam Optics William Optics Apochromatic refractor AP 71/350 Triplet Star 71
Product description:William Optics brings a new high-Apo on the market: According to the magazine Sky & Telescope Hot Product a 2015! This optimized for astrophotography, apochromatic refractor is composed of five elements in three groups: The lens is a triplet that ensures maximum color purity. Two other single-element assemblies serve as field flattener (flattener). This unique 3-1-1 design from FPL-53 (Ohara) fluorite lights sensors with 45mm diagonal pure color with point-like star images from - ideal for full-frame cameras! The 2.5 "-Auszug with 1:10 gear and 35 mm focusing path is provided with a M48 thread. This offers multiple connectivity options for cameras. For example, bayonet adapter with M48 thread directly a single lens reflex (DSLR) are connected . Since the correction optics is already integrated in the optical system of the star 71, there are no problems with the optical path lengths, as they have been otherwise if you use an external flattener. The Star Apochromat 71 is ideal both for photography large fog areas, such as Rosette Nebula or the Lagoon Nebula (M8), as well as large galaxies like Andromeda (M31) and Triangulum Galaxy (M33) is suitable. The Star 71 was developed for photography. Therefore, it is not supplied with a diagonal mirror. It is also not normal 2 "are connected -Zenitspiegel because the back focus of the star 71 is not enough. This is the Star 71 but can also be used visually, William Optics has developed a special star diagonal, where as usual 1.25" eyepieces can be inserted. You can find the mirror under "recommended accessories". Specifications:
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