What a bargain! Oberwerk high-quality light-weight 60mm binoculars, at a 50mm price! That extra 10mm doesn't sound like very much- but 60mm objectives gather 44% more light than 50mm models (surface area = pi*r2). With that much extra light-gathering power, these are ideal for a low-cost entry into binocular astronomy. They are also excellent for birding, nautical applications, and surveillance.
Not only do you get big 60mm objectives- you get the same highest-quality BAK4 prisms that are found in much more expensive models. These are available in your choice of either 9x, 12x, 15x, or 20x magnification. All air-to-glass surfaces are fully broadband multi-coated to decrease light loss due to scattering and reflections, a feature normally found only on binoculars with much higher price tags. All Oberwerk binoculars have rugged rubber-armored metal bodies, all-glass lenses, right ocular diopter adjustment, brass 1/4-20 tripod adapter threading, case and caps.
|
Objective size
|
60mm
|
|
Magnification
|
Choice of 9x, 12x, 15x, or 20x
|
|
Prism
|
BAK4
|
|
Optic coating
|
Fully broadband multi-coated
|
|
Field of view
|
9x- 95m at 1000m (5.5°)
12x- 100m at 1000m (5.7°)
15x- 71m at 1000m (4.1°)
20x- 52m at 1000m (3°)
|
|
Exit pupil diameter
|
9x- 6.6mm 12x- 5mm 15x- 4mm 20x- 3mm
|
|
Exit pupil distance (eye relief)
|
9x- 16mm 12x- 14mm 15x- 12mm 20x- 10mm
|
|
Minimum focus distance
|
9x- 10m 12x- 15m 15x- 15m 20x- 20m
|
|
Weight
|
2.6 lbs.
|
|
Ocular View
|