Specifications: Objective diameter: 20 mm Magnification: 4x Exit pupil: 5.0 mm Usable eye relief (measured from rim of eyecup): 17 mm IPD: 54 – 72 mm RFOV (acc.to spec.): 10 degrees = 175 m RFOV (measured): 10.1 degrees = 177 m AFOV (measured, rounded): 41 degrees Focus type: IF (direction of rotation from close to […]
Specifications: Objective diameter: 18 x 9 mm (square) Magnification: 8x Exit pupil: 2 x 1 mm (square) Eye relief acc. to spec.: 11 mm Usable eye relief (estimate, measured from rim of eyecup): 9 mm IPD: 54 – 72 mm RFOV: 7.5 degrees = 131 m / 1000m AFOV: 60 degrees (approx.) Focus type: CF […]
Specifications: Objective diameter: 42 mm True aperture (measured): 42 mm Exit pupil diameter (acc. to spec): 5.25 mm Exit pupil diameter (measured): 5.1 mm Magnification (acc. to spec): 8 x True magnification (measured): 8.2 x Eye relief (acc. to spec): 18 mm Useable eye relief (measured from rim of eyecup): 14.5 mm IPD (acc. to […]
Specifications: Objective diameter: 54 mm Magnification: 2.0 x Exit pupil: N.A. Eye relief (acc. to spec): N.A. IPD: 58 – 81 mm RFOV (acc. to spec): “36 degrees” Focus type: IF Prism system: none (Galilean) Waterproof: no Weight (measured, with eyepiece cover and strap): 410 g Made in: China Remarks: Perhaps the best of […]
Specifications: Objective diameter: 32 Magnification: 8 x Exit pupil: 4.0 mm Eye relief (acc. to spec): 19 mm Useable eye relief (measured from rim of eyecup): 16 mm IPD: 56 – 74 mm RFOV: 8.9 degrees = 155 m AFOV: 67 degrees Minimum focus distance (measured): 1.95 m Focus type: CF (direction of rotation from […]
Specifications: Objective diameter: 42 Magnification: 10 x Exit pupil: 4.2 mm Eye relief (acc. to spec): 18 mm Useable eye relief (measured from rim of eyecup): 16.5 mm IPD: 56 – 74 mm RFOV: 7.6 degrees = 133 m AFOV: 70 degrees Minimum focus distance (measured): 1.9 m Focus type: CF (direction of rotation from […]
Specifications: Objective diameter: 42 Magnification: 8 x Exit pupil: 5.25 mm Eye relief (acc. to spec): 18 mm Useable eye relief (measured from rim of eyecup): 16.5 mm IPD: 56 – 74 mm RFOV: 9.1 degrees = 159 m AFOV: 69 degrees Minimum focus distance (measured): 2.0 m Focus type: CF (direction of rotation from […]
Specifications: Objective diameter: 90 mm True aperture: 90 mm Focal length: 500 mm Focal ratio: f/5.6 IPD: 59 – 80 mm Focus type: IF Waterproof: no Weight (measured, w/o eyepieces, with eyepiece cover and objective caps): 5‘980g Made in: Japan Remarks: Borg of Japan produces a line of astronomical telescopes, components and accessories […]
Specifications: Objective diameter: 40 Magnification: 10 x Exit pupil: 4 mm Eye relief (acc. to spec): 16 mm Useable eye relief (measured from rim of eyecup): 14 mm IPD: 55 – 75 mm RFOV: 6.0 degrees = 104 m AFOV (measured, rounded): 60 degrees Minimum focus distance (measured): 5.5 m Focus type: CF (direction of […]
Specifications: Objective diameter: 35 Magnification: 7 x Exit pupil: 5 mm Eye relief (acc. to spec): 16 mm Useable eye relief (measured from rim of eyecup): 13.5 mm IPD: 55 – 75 mm RFOV: 8.0 degrees = 140 m AFOV (measured, rounded): 57.5 degrees Minimal focus distance (measured): 4.0 m Focus type: CF (direction of […]