The Olympus 10x21 RC II Binoculars: Foldable Daily Use Binoculars,
Combining a Beautiful Pocket Design with Easy Handling
For those who like a pair of binoculars to appear as fashionable as they
are practical, there is the Olympus RC II series. This pocket-sized
10x21 RC II model features compact dimensions and offers easy handling
for everyday general use, whilst excelling when used for bird watching,
camping or hiking, or travelling and touring.
These ultra portable roof prism type binos are fashioned using high
quality optics, feature multi-coated lenses for maximum brightness and
contrast, plus boast the added worry-free feature of UV (ultraviolet)
protection. Added to the enticing mix are precisely ground high index
prisms made of brightness-enhancing barium crown glass (Bak-4) to ensure
clarity and brightness to the very edge of the field of view.
Peace of mind and years of pleasure are further guaranteed thanks to a
25-year European warranty as standard.
This particular model offers 10x magnification and a 21mm objective lens
diameter. As it sounds, 10x magnification produces an image that appears
as if the user were ten times closer to their subject, while the
objective lens diameter refers to how much light can be gathered to form
that image. For daytime use a lens diameter of 21 to 25mm is ideal.
Also worth taking note of is the exit pupil. Here that is 2.1mm, which
for 10x21 binoculars is arrived at via 21 divided by 10 = 2.1 exit pupil
in mm, so in line with the 2-3mm which is generally thought of as being
suitable for daylight use. Another thing to take into account is the
field of view, which here is 89 metres, and is defined as the width of
the viewable field at a distance of 1000m from the point of observation.
Closest focusing distance is 3 metres.
Offering a 10x magnification to bring faraway points of interest that
much closer plus a 21mm objective lens diameter, the Olympus 10x21 RC II
Binoculars deliver optimum quality from the optics provided.
Fast and easy focusing is provided courtesy of a large, centrally placed
knob. The 10x21 RC II model further sports a long 9.5mm eye relief for
extra comfort, plus diopter adjustment to allow them to be attuned to an
individual’s eyesight for comfortable viewing without glasses.
Boasting a tactile and ergonomic design and weighing 185g, the Olympus
10x21 RC II measurements are a manageable 106x88x38mm, while the package
includes a neck strap, case and protective lens covers.
In summary, with a lens configuration of 5 elements in 3 groups, and a
9.5 mm eye relief, the field of view at 1000m is 89m. The actual field
of view is 5.1° while the apparent angle of view is 50°.
Adorned with a sophisticated black finish, these are also binoculars
that will repay your original investment with years of good service. A
case in point: a 25-year warranty is included with any purchase.