N20839 Photo-Newtonian - BR-NT20839

  • The BRESSER N20839 Photo-Newtonian with its large 208mm aperture and short 812mm focal length produces a fast, rich-field optical design perfect for wide-field deep sky astrophotography and visual observations of stellar clouds, nebulae, and galaxies. This fast newtonian features no-tool knob collimation of the primary and secondary mirrors to make precise collimation adjustments easy. Use with the optional HR Coma Corrector for pinpoint stars across the field. 

  • Comes complete with Aluminum Tube; No Tool Secondary Collimation; ES Finder Scope Base; 2-inch Crayford Focuser with 1.25-inch Adapter with Integrated T-thread to attach optional T-thread Ring; Cradle Rings with Slotted Handle (can be an attachment point for piggy-back cameras; and Vixen-Style Dovetail; Front and Focuser Dust Caps; Weighs 22 lbs.

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    Description N20839 Photo-Newtonian
    Item Number BR-NT20839
    Focal Length 812mm
    Focal Ratio f/3.9
    Eyepieces Accepts 1.25" and 2" Eyepieces 

    Primary mirror 208mm Diameter; Aluminum with SiO3 Overcoat; Special low expansion H-PZ33
    Material Secondary mirror 71.45mm Minor Axis (34% Obstruction);
    97% Reflective EMD Coatings; Low Thermal Expansion Borosilicate Glass 
  • USA Limited Warranty is one year.




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