Zhumell Tachyon 25x100mm Astronomy Binoculars with Locking Aluminum Case

Item #ZHUG002-1

  • Your Price:
  • $249.98
  • + FREE Shipping
  • BaK4 prisms for excellent light transmission
  • Individual focus for precise adjustment
  • Waterproof and nitrogen-purged
  • Accepts 1.25-inch threaded astronomical filters
Questions? Let our experts help!
  • Description

     Zhumell's Tachyon 25x100 Astronomical binocular is an industrial-strength, field-worthy instrument for astronomy. With 25x magnification, 100mm objective lenses, and a built-in tripod adapter, it offers plenty of power for observing craters on the moon and for picking out features on the planets. It'll even afford good views of interstellar objects.

    Plus, now the Zhumell 25x100 Tachyon binoculars take standard, 1.25-inch astronomical filters to enhance your views of the moon, planets, nebulae, and other celestial bodies. Ruggedly constructed and waterproof, the Tachyon will take just about anything nature can throw at it, and its locking, aluminum case will keep it secure on the road. It's even covered by Zhumell's 25-year no-fault warranty, which is something everyone will love.

    High Performance Features

    • Giant 100mm objective lenses for deep-space bino-astronomy use
    • Fully multi-coated lenses
    • BaK4 prisms provide excellent light transmission
    • Individual eyepiece focus for the most precise adjustments
    • Accepts standard, 1.25-inch astronomical filters over the eyepieces
    • Rugged metal construction
    • Waterproof and nitrogen-purged

    The Zhumell Tachyon 25x100 is truly a stellar choice in astronomical binoculars.

    From the Manufacturer
    At Zhumell we're committed to precision, performance, and people. Our products are designed and tested to make sure that they perform not only to our expectations, but to our customers' as well. We know that Zhumell customers are unique individuals whose pursuits vary and who demand the best products available. Whether you're an avid birder waiting to catch a glimpse of a yellow-rumped warbler or an early morning duck hunter scanning the horizon for a flock of ducks, we have the products that fit your needs.

    Supplier SKU


    Shipping Restrictions

    Ships to most international destinations, APOs, and FPOs.

    What's Included

    Binoculars, Hard Case, Objective Lens Covers, Eyepiece Cover

  • Dimensions & Specifications

    Binoculars Series

    Zhumell Astronomical Binoculars



    Close Focusing Distance

    80 ft.

    Dimensions (in)

    10.8H x 15.4L x 5.5W Inches

    Exit Pupil

    4 mm

    Eye Relief

    15.44 mm


    Fold Down



    Field of View at 1000 Yards

    157 ft.

    Focus Type

    Individual Focus

    Interpupillary Distance


    Lens Coating

    Fully Multi-Coated



    Magnification Code


    Objective Lens Diameter

    100 mm

    Objective Lens Size Code


    Prism Glass


    Prism Type

    Porro Prism Binoculars


    Giant Binoculars

    Tripod Adaptable


    Twilight Factor





    164.8 oz.

    Marketplace Type Code

    Full Size


    Download the Zhumell Tachyon 25x100 Astronomy Binoculars Manual
    Zhumell Warranty Information
  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Default manufacturer warranty.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

Customer Q&A

1 - 5 of 12
1 2
  • Q1: Are there instructions for these binoculars?

    A: All of the manuals are downloadable from the Zhumell website at http://www.zhumell.com

  • Q2: Are these binoculars achromatic or apochromatic? I would rather not deal with any chromatic aberration. How hard is it to aim these? Is it possible to mount a simple red dot finder to them or is it not needed?

    A: The Zhumell Tachyon 25x100 Astronomical Binoculars are achromatic. It probably would be possible to mount a simple red dot sight on them, but there's probably no need.

  • Q3: My heavy duty tripod does have the quick release plate, and I do have the plate w/bolt that I used for my video camera. Would I still have to have an L bracket to hook up the Tachyon 25X100 to this tripod?

    A: You will not need an L-mount adapter with the Tachyon 25x100 Astronomical Binocular. It has a tripod adapter that will mount directly on the tripod.

  • Q4: We travel a lot and spend a lot of time in the blue ridge mountains and like to use our binoculars to see into the valleys. We have 28x80 and are interested in the tachyon 25x100. Would this be a good binocular for this application?

    A: It would definitely be a great binocular for that use, generally as you get higher than this in magnification the binocular is either a zoom or it is just too large to really carry around with you. These are big, but the aluminum case it comes with is nice for traveling.

  • Q5: Where are the Tachyon binoculars manufactured?  Where are the lenses ground?

    A: Both the lens grinding and manufacturing is done in China.

  • Q6: Which Tripod is the best for the Zhumell Tachyon 25x100 Astronomical Binoculars?

    A: We recommend the Zhumell Heavy Duty Tripod for use with the Zhumell Tachyon 25x100 Astronomical Binoculars.

  • Q7: Are these waterproof?

    A: The Zhumell Tachyon 25x100 Astronomical Binocular IS waterproof.

  • Q8: Do these use a BAK 4 prism?

    A: The Zhumell Tachyon 25x100 binocular does indeed use BaK4 glass in its prisms.

  • Q9: How many elements make up the eye pieces? What percent of the field of view is sharp?

    A: The Tachyon's eyepieces contain three elements. Because the binocular uses BaK4 prisms, the entire field of view is sharp.

  • Q10: How much is the weight, length and width of this binoculars?

    A: The weight is 9.75 lbs., the length is 15.4 inches and the width is 10.8 inches.

  • Q11: I am interested in this Zhumell 25x100, besides looking at stars, can it use for other outdoor activities as viewing birds and sailing regatta.

    A: Absolutely, although with that high of a magnification you will definitely want to use it with a tripod.

  • Q12: I wear glasses, would this item be good for my eyes?

    A: Because this is an individual focus once you focus the binoculars they are set for your eyes to view distance, this makes them good with or without glasses.

  • Q13: I'm thinking of purchasing a set of Tachyon 25x100 binoculars as I over look a harbor I like to look at the ships in the distance. Could you please tell me if these binoculars set up on a tripod would be suitable for that purpose? And would you send me details of the type of tripod?

    A: These would definitely be a great choice for that use. They are designed to work with any standard photographic tripod the one we sell the most with these are the Zhumell professional tripods.

  • Q14: Is there much of a noticable difference in what I will see in the night sky [planets, nebula, moons, ect] in viewing between the Zhumell Tachyon 25x100 and the Zhumell Super Giant 20x80 Astro-binoculars.

    A: The difference is that the magnification will bring things 5x closer with the Tachyon.

1 - 5 of 12
1 2

Ask The Experts

Have questions about an item or need advice on selecting the right astronomy gear? Our team of telescope experts is here to help! Avid amateur astronomers themselves, they've tested products in the field and can provide personalized recommendations.

You can reach our Customer Support line at 1-800-303-5873. We're open 8 a.m. to 8 p.m. Central Time, Monday through Friday and 9 a.m. to 4 p.m. on Saturday.

After hours? Drop us an email at info@telescopesplus.com. We'll get back to you as soon as possible, usually within 1 business day.