Vixen SD81S FPL-53 ED Refractor Telescope

Features High-performance Super FPL-53 ED glass lens Short overall length and low weight Ideal for planetary observation and photography Illumination with a 44mm image circle for full format Pure-color, high-contrast images Description A new 81 mm apochromatic refractor with high-performance Super ED glass (= SD). The FPL53 glass reproduces an extremely clear and sharp image through an extremely high level of elimination of residual color defects. The SD glass is designed in such a way that it brings all the rays of violet, red, blue, yellow and green together very precisely on the same plane. The special lens material reduces the chromatic aberration about all colors. In combination with the new optional SD Reducer HD Kit or SD Flattener HD, these refractors enable illumination with a 44mm image circle for full format SLR cameras. The advantage of these SD refractors is their short length and low weight. The ED81SII, ED103S, ED115S refractors were originally developed for the visual observer or photographer with APS-C cameras. However, the new SD series has also been optimized for the use of full-frame cameras by replacing new inner panels. The large focuser enables heavy cameras to be attached without tilting. The included folding mirror allows comfortable observation, even in unfavorable observation situations, and also offers a T2 thread for connecting a DSLR camera. What's Included Refractor SD81S telescope Pipe clamps Flip mirror folding mirror Handle Dovetail rail Red dot finder Specs Optical design Apochomatic Refractor Mirror/Lens diam. 81 mm ED Glass Yes Focal length and Aperture ratio 625 mm f/7.7 Angular resolution 1.43 arc seconds Eyepiece adapter 50.8mm (2 inches) and 31.7mm (1.25 inches) Visual limiting magnitude 11.3 (approx., mag) Viewfinder XY Red Dot Finder II Dimensions and weight 90mm dia x 585mm, 3.6kg Warranty Vixen warranties its products to be free from initial defects in materials and workmanship for a specified period based on part type: Vixen Electronic Parts: Limited One Year Warranty Vixen Mechanical Parts: Limited Two Year Warranty Click Here to read more CA Residents: Prop 65 WARNING(S)