42-mm Nikon EDG Binoculars
- Nikon’s finest binocular
- Startlingly bright,
- Amazing depth of field
- Huge field of view
- Great design – easy
and comfortable to use
The Germans and Austrians have long dominated the top-end binocular market and rightfully
so. There was a clear difference in quality and no others challenged their wares.
Traditionally, the most critical buyers and those who demanded only the best sports
optics needed look no further than the top three European manufacturers. Well, the
world has changed. Be there no question, with the introduction of the new Nikon
EDG binoculars, the top trio is now a quartet.
Nikon is well known in the camera world as one of the finest optics manufacturers.
In the case of the EDG binoculars, that expertise comes through in flying colors.
Bright, vivid, gripping colors. For you “Nikonites”, the EDG is the binocular you’ve
always waited for, and maybe for the rest of us too. What you see is the single
most crucial factor in evaluating any binocular, barring any glaring problems in
their basic function. The new EDG binoculars stand out optically in all aspects.
It is the richness of the image, the sharpness, the stunning detail that makes a
profound impression. The quality of the view puts these binoculars in a very elite
The EDG name was derived from ED Glass which is ‘extra-low dispersion’
or ‘extra-high density’ glass – however you want to think of it. This type of glass
is often seen in high- end spotting scopes and camera lenses and is appearing more
often in binoculars. ED glass reduces the scatter and separation of the different
wavelengths of light so that they all arrive simultaneously on the same focal plane:
your pupil. This limits the green/magenta color fringes, called chromatic aberration,
around high-contrast objects and at the edges of the field. You will also see a
difference in something that you might not associate with chromatic aberration:
its absence results in a sharper image.
Field of View
Another impressive optical quality of the EDG binoculars is their extensive depth
of field. This is one of those things that we rarely write about because it is so
hard to quantify. When you have focused on a particular object, depth of field comprises
all that is in focus both in front of and behind that object. Binoculars with shallow
depth of field cause the user to constantly adjust focus, particularly with objects
closer to the observer. Additionally, with a shallow depth of field, the user must
be more precise in focusing since there is less room for error. Greater depth of
field results in an enhanced three-dimensional perspective. While small differences
in depth of field are virtually impossible to quantify, big differences are readily
apparent. The EDG binoculars have simply stunning depth of field; in this, they
exceeded all competitors. Still another property of the EDG binoculars is their
huge field of view. Nikon published the following numbers for the field of view
at 1000 yards: 459 feet on the 7x42, 443 feet for the 8x42, and 374 feet on the
10x42. All of those are above average for 42-mm binoculars at those respective magnifications.
So the numbers look good although in our experience, what a manufacturer says and
what it means in terms of field performance are difficult to measure, and sometimes
hard to even see. What we can say is that we tested them in the field and they did
have a larger usable field of view than their competitors. The incredible image
quality and extensive depth of field mean that, with the EDG you see more of what
you’re looking for than with most high-end binoculars.
brightness always ranks very high on the list of critical optical performance parameters.
Many factors combine to produce image brightness, ranging from the quality of glass
and coatings to the physical assembly of the prisms, and so on. When looking strictly
at image brightness, the EDG binoculars, though bright, were not the brightest binoculars
we tested. We qualify this last statement: the EDG are very bright and of those
we tested, only one binocular was marginally brighter. That being said, it was a
big surprise to us that, despite another binocular delivering a brighter image,
the EDG consistently outperformed the brighter binocular. The EDG produced more
image detail and greater richness than the brighter binocular in all light conditions.
We’re still not even sure how that is possible! But we all saw it, and seeing is
In reading the published specifications for the EDG, one number really turned us
off: the 9.8-foot minimum close focus. We use our binoculars to observe nature and
we want to look at everything from birds to butterflies, bugs, flowers or moss on
trees… If we have to be 10 feet away to focus, we just can’t see details on small
things or get close enough to see subtle features. Minimum close focus is something
that manufacturers often seem overly conservative with, perhaps because perception
of it varies with the observer. We often qualify our discussion of close focus by
noting the distance at which the visual field deteriorates either by separating
into multiple images or going partially dark. With that in mind, we don’t know how
Nikon got 9.8 feet for their minimum close focus! All of us got down to about 7
feet plus or minus an inch without any visual field collapse. While 7 feet isn’t
the world’s shortest minimum close focus, it’s good enough, and it’s a lot better
than 9.8 feet!
Flat Field Performance
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In flat-field performance, the EDG binoculars are good, though not as good as their
cousins, the Nikon Premier LXL, which are pretty much the best ever in this character.
There was almost no detectable pin-cushioning or barrel distortions (see the All About Optics section on the site for definitions).
The distortions were negligible overall, even at field edge where all binoculars
Stepping back, one of the first things you’ll notice about the EDG is that, like
many new binoculars today, it has an “open bridge” or “double-hinge” design. Unlike
a traditional roof prism with a broad center hinge, this design allows a user to
wrap their fingers around the barrel. Some users will find greater comfort and gain
a more secure grip holding their optics this way. We noted that the distance between
the hinges of the EDG is a bit short for users with fairly large hands, in which
case only two, or at most, three fingers of each hand fit in between the bridges.
Size And Weight
EDG binoculars are offered in
five different models: 8x and 10x32, and the 7x, 8x, and 10x42 versions. We won’t
say much about the 32-mm EDG models since that’s a subject for a separate review.
The 42-mm versions are of average dimensions: 5.1 inches wide by 5.9 inches tall
with eyecups fully down, (6.4 inches with them up). The 7x/8x EDG weigh in at 28.6
oz. and the 10x model at 28.9 oz. This is slightly greater than the 25-26 oz. we
would prefer to see in a top 42-mm binocular but the EDG are so well-balanced and
comfortable in hand that they just don’t feel as heavy as the scale says they are.
This brings up two things that are worthy of note: the first is balance. How a binocular
distributes its weight in your hand determines how much fatigue it causes in your
arm. Our review team spent long days birding with the EDG (is this a great job,
or what!) without significant fatigue. If someone actually experienced neck fatigue,
it could be quickly cured by using a harness. The second thing we need to comment
on is shape and external coating, which affects how comfortable a binocular feels
in the hand. The soft rubber armoring of the EDG has the same almost-sticky feel
to it that the Premier LXLs had. We happen to like it, and see it as a plus. There
are also thumb recesses well positioned on the underside of the barrels for greater
comfort. The EDG have a magnesium body, touted by Nikon as ultra durable. Additionally,
the EDG are fully sealed and nitrogen-purged to be waterproof, dust-proof and internally
Other physical properties include eye relief, which is more than adequate for all
models, at 22.1 mm, 19.3 mm and 18.0 mm for the 7x, 8x and 10x respectively. The
42-mm EDG binoculars go from minimum close focus to infinity in a zippy 1.2 turns
of the focus knob, with an action that is smooth and effortless right out of the
box. You have to score them highly for focusing speed and ease. The eyecups adjust
helically, with three positions in addition to fully-in, all marked by nice, firm
detents. The eyecups were very well executed and engineered. Included in the box
are also soft rubber wrap-around eyecups that can help reduce stray light from the
sides for non-eyeglass wearers. EDG binoculars have a large interpupillary distance
range of 53-74 mm. This is very nice, especially on the low end, where people with
close-set eyes often have trouble finding binoculars that fit their face.
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The diopter adjustment on EDG binoculars is built into the focus knob and is accessed
by pulling the knob upward from the hinge to expose the dial that adjusts the diopter.
That dial has a nice action and is clearly marked, and while it doesn’t lock in
place, it doesn’t need to since it is hidden by the focus knob. Integrated center
focus/diopter mechanisms are becoming more common, especially in high-end binoculars.
We think this design has downsides relative to locking diopter controls located
on the oculars. In the initial version of the EDG, the focus knob popped up way
too easily and disengaged focusing. Nikon fixed this in the more recent models.
This doesn’t negate the issues we have with center focus/diopter adjustments, but
at least it is a vast improvement over the previous version.
Cover and Case
Another thing Nikon fixed with
their recent upgrades to the EDG is the rain guard. The first one was very innovative
but ultimately unsuccessful. The old rain guard was made of hard plastic that clacked
noisily against the binocular as one walked. This rain guard has been replaced with
a soft rubber one that fits a bit loosely over the oculars but adequately covers
them. It’s simple, effective and a big improvement. Nikon also included “winged”
eyecups for users who don’t wear glasses as standard equipment with the EDG binoculars.
Although the rain guard does not fit over them, Nikon anticipated this limitation
and thoughtfully provided two hard plastic caps that fit fairly snugly inside these
eyecups. It is another nice addition that Nikon provides as standard equipment rather
than as an accessory to be purchased. Some people will like them and use them, and
others won’t, but at least everyone gets the option. We give them high marks for
anticipating users needs.
The objective lens caps are hinged and they fit onto a stiff rubber ring that attaches
over the barrel ends. These lens caps swing out when the binocular is in use or
snap closed; in that, they work pretty well. The issue is that when they are open,
they tend to snag on things, often pulling the entire assembly, cap and ring, right
off. Since you don’t always know that this has happened, in effect, they tend to
promote the one thing they were designed to prevent: loss of lens caps in the field.
So this was a good idea that needs a bit better execution. We hope Nikon is generous
about replacing these upon request until they figure a fix for it. The strap is
a hybrid of neoprene rubber and wide cordura that tapers down to fit through the
well-positioned lugs on the sides of the barrels. It is fairly comfortable by itself,
though some users may still prefer a harness-type strap. Lastly, there is the case,
which is made of soft leather and cordura and is well padded inside. We have qualms
about the elaborate flap-closure mechanism. The flap has a strap with two holes
in it that fit over a small post riveted into the outer portion of the case. A double-toothed
clasp of the type common on backpacks would have been better. While the case is
very classy overall, Nikon over-engineered it, and a simpler approach could have
been a lot more functional. Then again, no one buys binoculars this good for the
The Nikon EDG binoculars are priced quite reasonably for high-end binoculars. The
lowest internet price you can expect to find for the 7x42 EDG is
$2,780.95); the 8x42 can be found at
$2,850.95) and the 10x42 for
$2,980.95). Price and performance make the EDG an appropriate choice
for those who demand nothing but the best.
Overall we are extremely impressed with the Nikon EDG binoculars. Their optical
performance meets or exceeds that of the best binoculars on the market today in
every aspect. The design is innovative and thought out down to the finest detail.
They are razor sharp, bright, clear and vivid. The amazing depth of field seemingly
inserts the viewer in the view. The EDG binoculars are more than just Nikon’s entry
into the high performance binocular market: they are the cutting edge.
Nikon EDG Binoculars - current
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