The all-purpose “ED” binocular: Celestron Nature DX ED 10×50 – 339 euros – Field test

PREMISE

Amateur astronomers from all over the world are used to associating the well-known American brand Celestron to a wide range of telescopes. In fact, in recent years the brand has managed to offer not only sky observation enthusiasts but also nature enthusiasts an interesting series of binoculars: from Up Close G2 to the series Outlander X, to the series Skymaster, to the series Nature DX.
New this year is the range Nature DX ED, which was kindly provided to me by Auriga (Celestron Italia), the official distributor for Celestron products in Italy. This new series consists of four formats: 12x50, 10x50, 10x42, and 8x42. Personally, I decided to ask for the "right middle ground," therefore the classic and versatile 10x50, whose current price is €339.

As usual, the review includes the technical specifications and my personal impressions from various observing sessions, from astronomy to birdwatching. The video also includes some shots taken by placing the iPhone XR camera on one of the binoculars' eyepieces. Enjoy the video and the reading!

 

TECHNICAL DATA DECLARED BY THE PARENT COMPANY

Characteristics	Specifications
Enlargement	10×
Lens diameter	50 mm
Real field of view	5.9°
Field of view at 1000 m	103 m
Exit pupil	5 mm
Pupillary extraction	17.8 mm
Minimum focus	2.5 m
Interpupillary distance adjustment	63–74 mm
Diopter adjustment	±3
Twilight Factor	22,36
Relative brightness	25
Optical treatments	Multilayer on all surfaces
Type of prisms	Roof, BAK-4 glass
Treatment of prisms	Multilayer
Weight	806 g
Waterproofed	Yes
Nitrogen filled	Yes
Tripod adapter	Yes
Custody	Nylon
Dimensions	163 × 35 × 61 mm
Price (November 2025)	339 €
Official distributor	www.celestron.it

ACCESSORIES SUPPLIED

As always, to check out the equipment, I recommend watching the short video I posted on my YouTube channel and which I present below. We have a complete set minimal The package includes a textured nylon bag that can handle even a little rain. Inside the box, you'll also find an instruction manual, the essential cleaning cloth for the optics, a small fabric shoulder strap for carrying the binoculars, and the obvious fabric shoulder strap for holding the case.

 

OPTIONAL ACCESSORIES

As optional accessories, if you want to use it on a tripod, I recommend a Celestron photographic tripod: in my opinion the model with code A-WF6734 is sufficient, of which I attach the link, capable of supporting binoculars up to 4 kg. Furthermore, if you wish, a universal adapter is available for NexYZ smartphone, of which you can find an in-depth video review on Binomania.

MECHANICS AND FOCUSING SYSTEM

The Celestron Nature DX ED It features the same design as the cheaper ’Nature DX“ Not equipped with ED low dispersion lenses. In fact, these are binoculars with roof prisms and a central hinge to which the two tubes are attached, creating a decidedly wide bridge: 61 mm at the widest point by 46 mm.
The rubber armor is the classic Celestron black color and is made of a different series of materials; on the side, to improve grip, the area is more porous, I would say "orange peel", while remaining smooth on the lower part and on the bridge. There are no particular aesthetic frills, if only for the two "Celestron" and "ED" logos, mutually visible on the right and left tubes, and the initials Nature DX ED near the collar on the eyepiece.

The front of the focus knob also quickly reveals some technical features: in addition to the acronym Nature DX ED The 5.9° field of view and 10×50 mm format are visible.
On the side there are two buttonholes set directly into the frame which allow, as anticipated, to attach the shoulder strap.

The optical hull is made of polycarbonate, So, we have a fairly light product that's reasonably shock-resistant. My electronic scale estimated a weight of 810 g, perfectly in line with Celestron's claims. The binoculars are slightly unbalanced toward the lenses, while ergonomically, by keeping your middle and ring fingers on the bridge, you can use your index finger quite comfortably to facilitate focusing.

For this purpose, the designers have included a fairly large focusing knob (30 mm by 25 mm), also protected by a rubber coating with grooves for easier grip. The hinge attachment area also features an orange ring that adds a subtle aesthetic touch. Focusing is quite smooth, with no play or sticking.

The grip isn't the best; however, you can still handle the binoculars even with sweaty hands and possibly with winter gloves. The minimum focus I found on this model is perfectly in line, again, with Celestron's specifications: I personally managed to get sharp images at about 2.40 m.

To reach infinity from this distance, you need to rotate the knob counterclockwise about one and a half turns., while it's sufficient to quickly shift the focus when we need to frame subjects 20 meters away and then zoom out to infinity. It certainly doesn't achieve the depth of field of a 7x42; in any case, it can be used for most nature observations, perhaps with a nod to medium- to long-distance ones.

Like all products for outdoor use, the Nature DX ED It is waterproofed and filled with nitrogen.

OPTICS

Goals

Compared to the series Nature DX Extra low dispersion (ED) optical elements have been used, which are capable of eliminating chromatic aberration, at least in theory. In practical use, I noticed a slightly warmer tone in the whites. The image in the center of the field is sharp, although obviously not as good as top-of-the-range models, and the contrast remains moderately high.

Mechanically, the lens is embedded approximately 12 mm inside the optical tube, protecting the front lenses from impacts and, to some extent, from lateral light. The very simple system of caps with an elastic ring that wraps around the tube is functional, although in windy conditions or when observing downward, it's helpful to keep them secured with your thumb on the lower optical body.

Eyepieces

If you look at the price, it's not very easy to get wide-angle fields of view; Celestron just misses it, in the sense that the “wide-angle” I certify at 60° apparent field here is only 59°, or 5.9° of real field, equal to 103 m at 1000 m. To benefit from wider-angle views, you need to invest a few hundred euros more.

The diameter of the field lens is 20.50 mm; the size of the eyepiece barrel, including the lens hood, is only 40.80 mm, and This allows my 66 mm interpupillary distance to benefit from an eyepiece spacing of almost 22 mm. These are very comfortable binoculars, in my opinion, even for enthusiasts who don't have very long interpupillary distances. Therefore, they are also ideal for teenagers and possibly children.

The lens hood extension system rotates, with no predefined click-stops. The rubber surrounding the plastic cage is comfortable enough even for prolonged use. Celestron claims an eye relief of almost 18 mm; using my somewhat spartan method, checking the distance between the edge of the extended hood and the center of the field lens, I measured approximately 15 mm. Personally, I would recommend eyeglass wearers try the hood on at a qualified shop before purchasing.

Prisms

Celestron used Schmidt-Pechan roof prisms. The exit pupil is not perfectly circular; I did not notice any obvious vignetting at the edges, and the field diaphragm, when focusing at infinity, is almost perfectly sharp, with just a hint of blue fringing. Stray light containment is similar to that of other products in the same price range: there are no obvious problems near the pupil, but there is some internal reflection at the outer edges.

Anti-reflective treatment on lenses and prisms

The anti-reflective coating is present on every optical surface and displays a faint purple, sometimes ruby, hue. My containment test, observing the details of my face, demonstrated that this performance is superior to that of many binoculars in the same price range.

Try to spotlight your observations against the light 

Thanks to the true, non-wide-angle field, I have to say that light containment is very good for its price range. I often observed tits on branches with the sun practically hidden by the edge of the field, and aside from residual chromatic aberration, I didn't see much intrusive light. In evening use, you can see the spikes of the roof prisms on the brightest spotlights, but nothing too intrusive. Overall, I liked it.

 

 USAF CHART TEST AT 35 METERS

The standard USAF CHART test showed that these binoculars display the number 2 and horizontal and vertical lines as well as most binoculars of the same size. Contrast and sharpness are obviously inferior to top-of-the-line models, and color rendering is superior, but the difference is similar to the price difference.

CHROMATIC AND GEOMETRIC ABERRATIONS

Chromatic aberration at the center of the field

As you know, there is a difference in quality between ED binoculars offered in the €350 price range and those offered in the €1000–2000 price range. In any case, in the center of the field, under most lighting conditions, the Celestron Nature DX ED It performs very well. Chromatic aberration is only rarely noticeable, which is more visible in the version without low-dispersion glass.

I must admit that in most lighting conditions it also passed the "white gazebo" test with flying colors. A residual chromaticism is more evident when observing highly contrasting subjects against the light, such as branches, birds of prey, and airplanes, where a very faint violet-green halo can be seen on the edges of the silhouettes.

Lateral chromatism

Lateral chromatism increases as you move from the center toward the edge when observing "high-contrast" subjects, but it never becomes too invasive. However, its containment is good in most observations, where it is almost imperceptible, similar to axial chromatism.

 Field curvature

As you might expect, these binoculars, being entry-level, do not have aspherical eyepieces and therefore do not have a perfectly flat field. In fact, the image definition gradually begins to degrade starting from about 75–801 TP3T of the field.

Angular distortion

Pincushion distortion is noticeable starting from about the 80%'s center of field. Being insensitive tothe “rolling ball” effect” During panning, that is, when you quickly frame the panorama by moving from right to left and from left to right, I must admit that, perhaps also thanks to a non-wide-angle field, the observation seemed decidedly not tiring to me.

 Other aberrations

In astronomical observation, when observing star fields, coma and astigmatism can be observed starting from about 75–80% of the field. Stellar disfigurement is most noticeable on the brightest stars. These binoculars were not specifically designed for this type of observation, but as we will see in the specific section, their format is very usable even under starry skies.

PRACTICAL IMPRESSIONS IN THE FIELD

Birdwatching

I birdwatcher They prefer to use the 10×42 format rather than the 8×42 because they consider those two additional magnifications essential to perceive better details on the birdlife freehand. The Celestron 10×50 boasts an optimal weight, in the sense that it is similar to that of many 42 mm diameter binoculars.; for this reason, personally, when size allows it, I prefer to walk in nature with a larger diameter so I can use it in shaded areas or at twilight.

In this case, the Celestron Nature DX ED has proven to be a good performer in its price range: the use of low dispersion glass, although obviously not reaching the quality characteristics of a top-of-the-range binocular, allows for birdlife observation with good color representation. During the month of November, also taking advantage of my winter bird food boxes, I observed tits, coal tits, robins, finches and more for a long time, and I must confirm that, although I am used to using top-of-the-range binoculars, I would have loved to have had a Celestron binocular of this type when, in the 90s, I bought my “C8”.

With a price similar to that of a good astronomical eyepiece it is still possible to make observations of nature which I confirm are very satisfying.. Another positive factor, for me, is the comfort of the eyepieces: given the interpupillary distance of only 66 mm and the excellent positioning of the lens hoods, I noticed that the eyepieces, even though they do not have a very large field lens, rarely fog up on the outside, despite the considerable amount of exhalation vapor.

If you want to observe wildlife in the woods, I would recommend purchasing the 8×42 format because you could benefit from a greater depth of field.

 Landscape

Even in this case, low dispersion glass comes to the rescue. The Celestron Nature DX ED It is able to provide interesting images even of snow-capped peaks or backlit landscapes, resulting in a significantly better result than the series Nature DX which I tried a while back. It doesn't have an ultra-wide angle; however, it barely reaches the standard 60° apparent field of view, so given the price and features, I'd say there's really nothing to complain about.

Again, I appreciated the size of this one, as its weight of around 800 grams makes it easy to carry, even though it isn’t as light as an 8×32.

 Dusk

Optimal twilight factor: tested with a top-of-the-line 10x50, it loses about 3–4 minutes of light at twilight and obviously offers lower sharpness. However, the price difference, which is almost eightfold, remains a parameter that enthusiasts must evaluate based on their needs, to determine whether it is worth investing so much.

In this case too the Celestron Nature DX ED It has proven to be an excellent performer in observing roe deer and foxes at dusk. The containment of stray light is also good here. I can only go from memory, but I recall past tests conducted on the non-ED model revealed lower contrast.

 Astronomical observation

The 10x50 has been the preferred format for handheld use among amateur astronomers for many years: the 5 mm exit pupil is almost always usable even under moderately polluted skies. The magnification, which is higher than the classic 8x, also manages to slightly darken the background sky, while increasing the detail of star clusters and galaxies.

I enjoyed observing the Pleiades, the Hyades, the Orion Nebula, the clusters in Auriga and some other stellar objects, including the galaxies M81 and M82. It is certainly not comparable to the Celestron Skymaster ED, the top of the range model from the company; however, if you want a lightweight and economical pair of binoculars for everything from nature observations to sky observations, I would definitely recommend — especially if you are a fan of the American brand — to buy the 10x50 without hesitation.

Presumably, with the 12x50 format you could have a benefit in the perception of the faintest details, such as in the case of star clusters or galaxies and lunar craters but you should necessarily lean on a support, use a tripod or lie down on a bed, resting the eyepieces on the eyebrow arch to distribute the weight on your head.

In short, even in this case I feel like promoting it in its reference range

PROS AND CONS

Merits

• Good quality ED lenses.

• Compact and lightweight, similar to many 42mm binoculars.

• Excellent eyepiece size for people with interpupillary distance less than 66 mm.

• Good chromatic aberration control in its price range.

• Slightly warm white tones, which increases the perception of contrast.

• Good price-performance ratio.

• Multifaceted format, suitable for all observation sectors.

Defects

1. It's not comparable to a top-of-the-line model costing 10 times more; don't expect the same sharpness or contrast.

2. Apparent field not as wide-angle as more expensive models

3. Aberration containment less effective in more critical observations.

 

You will have therefore understood that in the range under 350 euros it has no significant defects and is a valid instrument.

 IN SUMMARY

Ultimately, with the Nature DX ED series, Celestron has demonstrated its ability to enter a truly competitive entry-level market segment, with characteristics of size, weight, optical quality, and ergonomics that undoubtedly make it a valid choice for many enthusiasts. This is especially true for amateur astronomers who own a Celestron telescope and want to benefit from the binocular views at low magnifications, both for astronomical observation and for nature observation, that only binoculars can achieve.

I am very curious to also verify the performance of the 12x50 in purely astronomical observations.

 PPRICE AND WARRANTY

Purchase price for the Celestron Nature DX ED in November 2025, recommended by Auriga.it: €339.

 THANKS

Thanks, as always, to Matteo Di Bella and Valerio Zuffi of Auriga for providing the model for this test and for allowing me to share my personal impressions from field tests. I invite you to visit the official website. Celestron Italy For more information and to purchase Celestron products, please visit the following link: shop.auriga.it; moreover, here you can find the chain of Italian retailers.

 DISCLAIMER

Binomania is not a store. On my website, you'll only find reviews of sports, photography, and astronomical products. My opinions are impartial, as is the duty of any journalist, and I do not earn a percentage of any sales on any product purchases. For this reason, if you'd like to purchase or have information on any price changes or new products, I recommend visiting the official website. Celestron Italy.