FC-76D Refractor Telescope

Description Like the FS series, the FC series are apochromatic refractors with two-element fluorite lenses.  The FC series have larger apertures and longer focal lengths than the FS series, and provide outstanding performance both for the visual observer and the digital imager.  The FC series has its own dedicated set of reducers and flatteners, and is also able to use some of these accessories from the TOA series. FC-76D The two telescopes in the FC-76D series consists of an apochromatic fluorite doublet with a 76 mm objective diameter.  Both telescopes are 540 mm f/7.5 instruments.  The front element uses an eco-glass for maximum light transmission, with a coated fluorite rear element for superb color correction.  FC-76DCU The FC-76DCU model features a fixed dew shield and smaller, 80 mm diameter barrel for the same performance in a package featuring reduced weight and overall length.  It utilizes a 1.25 inch rack and pinion focuser. FC-76DS The FC-76DS model features a retractable dew shield and 95 mm diameter barrel.  The FC-76DC and DS are optically identical.  The DS model utilizes the 2.7 inch focuser previously used in the Sky-90 telescope. Optical Tube Assembly only (mount, tripod, tube holder and finder sold separately).  Telescope FC-76DCU FC-76DS Part Number TFK07640 TFK07630 Aperture 76 mm 76 mm Resolution 1.5" 1.5" Limiting Magnitude 11.2 11.2 Light Gathering Power 120X 120X Focal Length 570 mm 570 mm Focal Ratio f/7.5 f/7.5 Optical Type Fluorite Doublet Apochromat Fluorite Doublet Apochromat Tube Diameter 80 mm 95 mm Tube Length (With Lens hood retracted) 656 mm 660 mm (567 mm) Tube Weight 1.9 kg 3.0 kg Recommended Finder 6x30 6x30 Metal Back Distance 159.0 mm  173.0 mm   Telescope Specifications  FC-76DC Visual System Chart FC-76DC Extender Q System Chart FC-76DC Extender C2X System Chart FC-76DS Visual System Chart FC-76DS Extender Q System Chart FC-76DS C2X System Chart