BK 909AZ3
Product Features
  • Diameter/Aperture: 90mm

  • Focal Length: 900mm

  • Multi-coated achromatic objective lens

  • Aluminum tube

  • Dew cap/Sunshade

  • Adjustable Objective lens Cell

  • 6x30 finderscope for easy location of objects

  • Smooth rack-and-pinion 1.25" focuser

  • 65% more light gathering power than 70mm

  • Perfect for serious beginners

Optical Design Achromatic Refractor 
Optical Diameter 90mm 
Focal Length 900mm 
F/Ratio F/10 
Highest Practical Power 180x 
Faintest Steller Magnitude 12.5 
Finder Scope 6x30* 
Focuser Diameter 1.25" 
Diagnol 1.25" 45 deg. Erect Image* 
Eyepieces 1.25" Super 25 and 10* 
Tube Weight 2.49Kgs 
Tube Dimensions 9cm x 86.5cm 
Shipping Weight 12Kgs 
Shipping Dimensions 102x42x24 cm3