Please Note: A finder scope, diagonal and eyepiece are not included in the OTA package and must be purchased separately if desired. The Photon™ line of Ritchey-Chretien astrograph telescope has been expanded with the addition of four new truss tube models (10,12,14 and 16 inch). Designed for today's astro imager, Photron™ truss tube RC telescopes deliver a sharp clear image from one edge to the other. The truss tube models are designed t carry on our long standing reputation for creating and manufacturing solid, stable, accurate tracking mounts, in a high quality RC astrograph telescope. iOptron® Photron™ truss tube RC telescopes feature low thermal expansion quartz primary and secondary mirrors with highly reflective dielectric coatings maximizing the light getting to your eyepiece or imagine device. The RC optical design delivers coma, spherical and chromatic aberration free results, perfect for color and monochrome imaging. A fixed position primary mirror eliminates image shift that occurs when focusing from other telescope designs. With 1/12th wave or better primary mirror our RC scopes delver images and views that are out of this world. Each Photron truss tube instrument comes equipped with a dual-speed linear bearing Crayford focuser that can facilitate our optional ASCOM compliant electronic focus control. Three focuser extension rings are provided for a "flex-free" solid extension as a means to take up any unneeded back focus. Its backbone, made up of strong, light, carbon fiber truss supports hold the optics firmly in place while keeping weight to a minimum. It's open air design results in rapid cooling, reducing the "wait time" before use. Photron™ by iOptron®, RC truss tube telescopes are sure to meet or exceed even the most discriminating imager or observers expectations.Manuals: Photron RC telescope operation manual Electric focuser installation and operation manual Specifications Optical Design Ritchey-Chretien Clear Aperture 16" (406mm) Focal Length 3250mm Focal Ratio f/8 Focuser 10:1 Crayford dual-speed Focuser size 3" Dovetail Bar Losmandy-style Mounting Bar (Top) Losmandy-style Tube material Carbon truss tube Tube Length 1114mm Tube Weight 93 lbs OTA Primary Mirror Cooling Fan Yes (three built-in fan, with battery holder) Other Accessories 1" long extension tube X2 2" long extension tube X1 Gross Weight 127 lbs Warranty One year limited
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