Zhumell offers two models of binoculars for star gazing, the Zhumell 20X80 SuperGiant Astronomy Binoculars and the Tachyon 25X100 Astronomy Binoculars.
Both the Zhumel 20x80 SuperGiant Astronomy Binoculars and the Zhumell Tachyon 25x100 Astronomy Binoculars can be used for astronomy and bird watching, wildlife observation, and long distance land and over-water viewing.
The Zhumell 20X80 SuperGiant and the Zhumell Tachyon 25X100 are both binoculars that are available at more acceptable prices than binoculars from some of the more established and renowned brands in the industry. However, both these binoculars can compete with better known brands out there on the basis of the lens coatings, quality of prisms, and sturdiness of construction.
That said, we'll have a closer look at the specifics of both models.
September 2014 Update: It's our understanding that Hayneedle is discontinuing the Zhumell optical brand. For those with a warranty claim, it's reported that Hayneedle is paying the original cost of the binoculars inasmuch as replacements and/or replacement parts are no longer available. Our articles about Zhumell binoculars will remain for reference purposes. If you were considering a Zhumell for personal use or as a gift, you might be interested in our Best Binoculars page where we tell our favorite binoculars in several price ranges and categories.
Both the Zhumell 20X80 SuperGiant binoculars and the Zhumell Tachyon 25X100 binoculars use fully multi-coated objective lenses that provide plenty of light for extreme low-light conditions. Their respectively 20- and 25-power magnification brings objects 20-25 times closer than they would appear with the unaided eye. The Porro prisms in the Zhumell 20X80 SuperGiant binoculars and the 25X100 Tachyon binoculars use BaK-4, as opposed to the lesser quality BK-7.
Zhumell 20X80 SuperGiant
Both of the Zhumell 20X80 SuperGiant and the 25X100 Tachyon binoculars have an exit pupil of 4 mm. Exit pupils measuring 4 mm are at the lower end of typical expectations for night viewing. Some binocular configurations, such as an 8X56, have larger exit pupils (in this example, 56mm divided by 8X = 7 mm) which are more suitable for night and low light level viewing. The 4 mm can provide a decent view, however, depending on the amount of light pollution in the area and other conditions.
Eye relief with the Tachyon measures 15.44 mm and with the SuperGiant astronomy binoculars it measures 17 mm; both should work reasonably well for those wearing glasses.
Not necessarily related to how binoculars work at night, but important to many users is the field of vision. This measures how wide the image will be when looking through the binoculars. Typically measured at 1,000 yards from the viewer's point, the Zhumell 20X80 SuperGiant binoculars have a field of view of 168 feet. The Tachyon 25X100 has a field of view of 157 feet. When considering the distance at which these are intended to be used, what would otherwise be considered a quite narrow field of view in a general purpose binocular is often considered satisfactory in a long-range binocular.
Zhumell 20X80 SuperGiant Astronomy Binoculars use center focus and the 25X100 Tachyon Astronomy Binoculars use individual focus. With the center focus one knob in the center of the binoculars adjusts the focus of both barrels at the same time. Individual focus means that, just as the name implies, each lens is focused individually. Military binoculars are typically of the individual focus design since it is not prone to having problems under less optimal conditions. While the individual focus arrangement can seem uncomfortable when one is initially exposed to it, a user typically gets the knack of making adjustments relatively quickly.
Additionally, when focusing an individual barrel on the binoculars, there is rarely a need for the same user to re-adjust the focus on subsequent uses. However, using the 25x100 astronomy binoculars with its individual focus for astronomy purposes only will not cause for any problem. When focusing on items on land, although you'll have a short period of becoming accustomed to individual focus, you're not likely to find individual focusing binoculars burdensome.
At only 4.4 pounds, you will easily be able to carry the Zhumell 20x80 SuperGiant binoculars on longer journeys you plan to make in order to use the binoculars in certain areas or to escape the city lights when you want to do some serious star gazing. What might really grab your attention is the size of these binoculars. Considering that these binoculars have an 80mm objective lenses and weigh only 4.4 pounds, one can say that these are quite unique, especially considering the price. In addition, these Zhumell binoculars have a built-in tripod mount which allows you to attach the binoculars to standard tripods and makes handling much easier.
Zhumell 25X100 Tachyon
While the SuperGiant binoculars are water resistant they are not waterproof and might well be damaged by water. However, with reasonable care they can be used at the beach without fear of being damaged. They are designed to protect the inner workings and optics from damage, but they are not designed or intended for extreme weather conditions. As with all binoculars, it is recommended they not be left outside when not in use.
Some people buy the Zhumell 20X80 configuration to search for ships and track them on the horizon. With the use of the tripod included in the bundled package deal or a tripod you already own, they can be used for the entire duration of the ship's course across your viewing area. As opposed to those who use them for casual recreation, those eyeing the sky do not feel their weight is an issue, as they typically use them with the tripod, which also prevents shaking and losing their target object from view.
Those who have used these binoculars for celestial viewing report they met or exceeded their expectations, although the first unit recieved from the seller was not always the one they kept, usually due to focusing or collimation challenges, and most would recommend them to their family and friends who share similar interests. If you should receive a Zhumell instrument that falls optically or mechanically short of its description, Zhumell's warranty provides for your satisfaction.
Zhumell's 25x100 Tachyon on the other hand is a bit heavier, weighing in at a little over 10 pounds. The design further includes a nitrogen-purged construction and individual eyepiece focus which is not unreasonable at the distances one would expect to use an optical configuration such as this. These binoculars can be attached to sturdy standard tripods as well.
Since the binoculars themselves are of a sturdy construction, you don't necessarily want to be put off by the quality of the case provided (it's a good quality and has nice, thick foam cushions - just not "excellent") or supplied neck strap. Like a number of binocular brands, Zhumell seems to save a bit of money on those items in order to provide competitive pricing and, to be honest, not many of us are going to be hanging binoculars as heavy as these around our necks!
If you've not already used a binocular as heavy as either of these, it wouldn't be unreasonable to think that just about any tripod could be used. Be forewarned though, that these weigh enough to require a sturdily made tripod in order to hold your binocular safely and securely.
For large binoculars such as the SuperGiant and Tachyon, we recommend considering appropriate Manfrotto or Garret tripods if possible. While the tripods included in the package deals will be serviceable, the others will be more likely to provide enjoyment over an extended period of time. The Garret 5000 model may be especially attractive for those budgeting carefully.
The Zhumell Tachyon 25x100 is completely waterproof. The smaller Zhumell 20x80 SuperGiant however, is not.
The Zhumell Tachyon 25x100 has nitrogen purged barrels and is zero grade nitrogen filled to get rid of any moisture in the barrels. This is especially important when they will be used outdoors or in cold weather to eliminate internal fogging. This means that no signs of water or fog can appear on the lenses or prisms within the binoculars. However, as with all optics, this doesn't mean that there will be no fog externally.
There are plenty of Zhumell consumer reviews to be found on the Internet for both the Tachyon 25x100 and the 20x80 SuperGiant.
When summing up hundreds of consumer comments regarding both the Zhumell 25x100 Tachyon and the Zhumell 20X80 SuperGiant astronomy binoculars you can conclude the following:
According to the reviews and statistics, you can conclude that the quality of the Zhumell 25x100 Tachyon Astronomy Binoculars makes it a reasonable buy for the price. The main downside seems to be the weight of these binoculars, which is not way out of line for large configuration binoculars. The same actually goes for the Zhumell 20x80 SuperGiant Astronomy Binoculars. See a handful of reviews left by users of these binoculars:
When purchasing the Zhumell 20X80 SuperGiant Astronomy Binoculars Package, you will receive the "Zhumell Professional Tripod" bundled in with the binocular. Carrying cases are included for both the binocular and tripod. It is recommended to use a tripod with these binoculars, since the viewing may become difficult due to your hands' normal movements being magnified. The binocular and its carrying case are available by themselves, however, and the price is lower than with the tripod, as you would expect. There are quite a few consumer reviews indicating that the binoculars are quite useable, but that the tripod included in the 20X80 package is somewhat lacking in steadiness and overall quality.
The Zhumell 25x100 Tachyon comes with a carrying case that will allow you to safely transport these binoculars. After this was originally written, Zhumell began offering a Tachyon package which includes a tripod. We continue to recommend the Manfrotto or Garret tripods, however, for ease of use and durability with binoculars this large and heavy.
Both the Zhumell 20x80 SuperGiant binoculars as the 25x100 Tachyon binoculars come with a 25-year no-fault warranty. A no-fault warranty allows you to send back the item so that Zhumell can repair or replace parts on your binocular or even provide you with new binoculars if they can't be repaired, even if you caused the damage.
You should be able to find the Zhumell 20X80 SuperGiant astronomy binoculars for less than $150 and the Tachyon should be found at less $250. In our opinion, you'll receive value in either the SuperGiant or the Tachyon - we recommend them as basic, budget binoculars.
If you had been considering either of the Zhumell "big eyes," we suggest that you consider the Oberwerk 20X80 Deluxe II or 25X100 individual focus binoculars. We believe they provide better durability and fewer users report problems than was the case with Zhumells.
If you're looking for a good binocular buy, you'll probably want to check out our Best Binoculars recommendations. OpticsReviewer readers also value our Binocular Comparisons page which compares binoculars, tells which we would choose, and explains in detail why we would choose that one.
|Exit Pupil mm||4||4|
|Eye Relief mm||15.44||17|
|Prism Type||Porro BaK-4||Porro BaK-4|
|Field of View at 1,000 yd/m ft/m||157/52.5||168/56.2|
|Close Focus ft/m||80/24.4||70/21.3|
Here are a few consumer reviews specifically for the Zhumell 25x100 Tachyon: