Entries by Christophe Zumstein

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Vixen BT-81S-A

Specifications: Objective diameter:   81 mm Focal length:  480 mm IPD: 57  –  (>) 80 mm Focal ratio: f/5.9 Waterproof: no Weight (w/o eyepieces, with eyepiece cover and objective caps): ca. 4‘100   g Made in: Japan   Remarks: Just slightly larger than its sibling with 70mm lenses, the Vixen 81 is an achromat – […]

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SIG SAUER Zulu 9 9×45

Specifications: Objective diameter:  45 mm Magnification:    9x Exit pupil:     5 mm Eye relief acc. to spec: 17 mm Usable eye relief (measured from rim of eyecup): 15.5 mm IPD:  56 – 74  mm RFOV:    7.2 degrees =  126 m / 1000m AFOV (measured, rounded): 61.5 degrees Minimum focus distance (measured): 1.3 m Focus type: CF […]

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APM 82mm ED APO

 No longer part of the collection Specifications: Objective diameter:  82 mm Focal length:  470 mm IPD:  54 – 76 mm True aperture:  82 mm (measured) Focal ratio: f/5.7 Waterproof: yes Weight (measured, w/o eyepieces, with eyepiece cover and objective caps): 4‘586g Made in: China Remarks: This is the larger of the two “small” APM binocular […]

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APM 70mm ED APO

Specifications: Objective diameter:  70 mm Focal length:   400 mm IPD:  54 – 76 mm True aperture:   70 mm (measured) Focal ratio: f/5.7 Waterproof: yes Weight (measured, w/o eyepieces, with eyepiece cover and objective caps):  3‘765  g Made in: China       Remarks: High performance in a compact package! This is the smallest […]

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APM MS 10×50 ED

Specifications: Objective diameter:  50 mm Magnification:  10 x Exit pupil: 5 mm Eye relief (acc. to spec): 20 mm Usable eye relief (measured from rim of eyecup): 16.5 mm IPD:  56 – 74 mm RFOV:  6.5  degrees = 114 m AFOV (measured, rounded): 65 degrees Minimum focus distance (measured): 9.8 m Focus type:  IF Range of […]

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APM MS 25×100 ED

Specifications: Objective diameter:  100 mm Magnification:  25 x Exit pupil: 4 mm Eye relief (acc. to spec): 16 mm Usable eye relief (measured from rim of eyecup): 13.5 mm IPD:  56 – 74 mm RFOV:  2.7  degrees = 47 m Focus type:  IF Minimum focus distance (measured): 35 m Range of diopter adjustment (estimate): +/- […]

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APM MS 28×110

Specifications: Objective diameter:  110 mm Magnification:  28 x Exit pupil: 3.9 mm Eye relief (acc. to spec): 15 mm IPD:  53 – 74 mm RFOV:  2.3  degrees = 40 m AFOV (according to spec.):  64 degrees Focus type:  IF Minimum focus distance (estimate): ca. 100 m Range of diopter adjustment (acc. to spec.): +/- 5 […]

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APM MS 20×70 ED

Specifications: Objective diameter:  70 mm Magnification:  20 x Exit pupil: 3.5 mm Eye relief (acc. to spec): 16 mm Usable eye relief (measured from folded eyecup): 14mm IPD:  56 – 74 mm RFOV:  3.3  degrees = 58 m Minimum focus distance (estimate): ca. 24 m Focus type:  IF Range of diopter adjustment (acc. to spec.): […]

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APM MS 20×80 ED

Specifications: Objective diameter:   80 mm True aperture:   80 mm (measured) Magnification:   20x Exit pupil:    4mm Eye relief acc. to spec: 16mm Usable eye relief (measured from rim of eyecup): 13.5mm IPD: 56 – 74 mm RFOV:  3.3 degrees =   58 m Minimum focus distance (estimate): 23 m Focus type: IF Range of diopter adjustment (acc. to spec.): +/- 10 dpt* Excess focus travel beyond infinity position […]

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Lunt Engineering 7×50 MS

Specifications: Objective diameter:  50 mm Magnification:  7 x Exit pupil: 7.1 mm Eye relief (acc. to spec): 23 mm Usable eye relief (measured from rim of eyecup): 17 mm IPD:  56 – 74 mm RFOV:  7.5  degrees = 131 m AFOV (measured, rounded): 52.5 degrees Minimum focus distance (measured): 7.15 m Focus type:  IF Prism […]