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The Olympus 10x42 EXPS I Binocular provides premium-level Porro prism performance at an attractive price. It is chock full of good features: high index BaK-4 Porro prisms, fully multicoated optics with aspherical lenses, fantastic ergonomics enveloped by rubber armor, and long eye relief. It is a great choice for a birder or big game hunter, and also makes for a practical stadium sports viewer. This 10x model, with its 42mm objective lenses, is a great twilight viewer that also provides a more magnified, distinctly larger subject than the usual 7-8x designation.
The Olympus 10x42 EXPS I Binocular provides premium-level Porro prism performance at an attractive price. It is chock full of good features: high index BaK-4 Porro prisms, fully multicoated optics with aspherical lenses, fantastic ergonomics enveloped by rubber armor, and long eye relief. It is a great choice for a birder or big game hunter, and also makes for a practical stadium sports viewer. This 10x model, with its 42mm objective lenses, is a great twilight viewer that also provides a more magnified, distinctly larger subject than the usual 7-8x designation.
Lens quality | High-index BaK4 prisms |
---|---|
Vision convenience | Long eye relief and adjustable eyepieces (twist up/down) |
Optical coating | Full multi-coating / UV coating |
Specialty | Environmentally friendly lead-free glass |
Type | Porro prism series |
Diopter adjustment range | over +/- 21/m |
Eye interval adjustment range | 60 - 70mm |
Lens configuration | 8 elements / 6 groups |
Magnification | 10x |
Objective lens diameter | 42mm |
Exit pupil diameter | 4.2mm |
Actual field of view | 5.5 |
Apparent field of view | 55 |
Field of view at 100m | 9.61m |
Eye relief | 18.4mm |
Relative brightness | 17.6 |
Closest focal point | 5m |
Dimension (WxHxD) | 18.7 x 13 x 5.7 cm (fully extended) |
Weight | 0.785kg |
Tripod Mount | None |
Focus Type | Center |
Field of View | -.3 m @ 1000 m |
Angle of View | 5.5 |
Dimensions | 18.0 x 5.6 x 12.9 cm |
Pupil Distance Adjustment Range | 9.3 to 10.9 mm |
Prism Type | Porro |
Eye Relief | 18 mm |
Exit pupil diameter | 4.2 mm |
Objective Lens Diameter | 42 mm |
Magnification | 10 x |
L-R dioptric correction range | 2 |
Closest Focusing Distance | 25.8 m |
Weight | 0.78kg |