zhumell 10-25×42 waterproof zoom monocular

Zhumell 10-25×42 waterproof zoom monocular is stated to be the preferred choice for sports, adventure, wildlife, and entertainment loving enthusiasts.

The exterior body is protected with a rubber armor to make it waterproof and resistant to the elements. The design patterns of the ridges, housing, eyepiece and the focusing lever are meant to give you flexibility in focusing and magnification.

The monocular could work with the equal efficiency of resolution and clarity for long distance and short distance watching. The monocular has a rating of 4.3 out of 5 stars.

zhumell 10-25×42


  • Field of view width is stated to be appreciably high
  • Convincing hand grip with the exterior rubber armor
  • Tripod adaptability
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    Magnification range from 10X to 25X
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    The nearest focus is indicated to be 6.5 feet
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    42mm curved objective lens for maximum light absorption
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    Easy to zoom dials
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    Comfortable eye relief
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    Anti-glare construction


  • The neck strap could cause discomfort while using the monocular over an extended period

Key Features

Objective Lens

The objective lens of the Zhumell measures 42mm. It is supposed to be designed for maximum light absorption from the surroundings. The multiple coatings on the lens could help in covering the target entirely by reducing the glaring effects and enhancing the image clarity.

Eye Relief

The Zhumell monocular is stated to have an eye relief of 14-9.5mm. This feature is supposed to enhance the fullness of the viewing angle considerably. You may get better coverage of stationary and moving objects with considerable clarity.

This feature could be particularly beneficial if you happen to wear eyeglasses. The design of eye relief is stated to be in synchronization with the magnification factor of the objective lens to enable full-size target object viewing.

Close Focus

The closest focus of the Zhumell monocular is stated to be 6.5feet. This feature is supposed to enhance the spotting scope for large and small sized objects that are located closer. It is supposed to show you the detailed features of the target object without distortion and a high level of clarity.


Magnification range of the monocular is from 10X to the maximum of 25X. It is supposed to be flexible for manual adjustments. It could show you the intricate details of a small object regardless of the distance and its movement.

You may zoom-in or zoom-out with a right field of view without compromising on precision and clarity.

The 42mm object lens diameter with good light absorption ratio and variable magnification could make the Zhumell monocular ideal for sports and wildlife watching.

Exit Pupil

​The exit pupil of the Zhumell monocular has a dimension of 2.8-14mm. It is stated to deliver the maximum volume of light from the object lens into your eyes. It is also supposed to enhance the magnification, clarity, and brightness of the image.

It is stated to work even in low light conditions (sunset, dense forest, early morning time just before sunrise, etc.) to give you the optimum visibility. You may increase or decrease the magnification of the object lens without affecting the quality of the exit pupil functionality.

Monocular Length

The length of Zhumell monocular is stated to be 6.2". The design of the barrel, bridge, and the eyepiece are declared to be in synchronization with the length for producing high-quality images.

Zhumell Monocular Review

Purpose: The Zhumell monocular is stated to be designed for sports and wildlife watching. The flexible nature of zooming and magnification could enhance the short and long distance watching experience. You could mount it on a tripod to enable extended viewing with 180-degrees to 360-degrees coverage.

Zoom: The Zhumell monocular is supposed to provide even image brightness regardless of the zooming range. It could mean you may watch a frog at a distance of 300 feet with the same clarity as you see a deer at a distance of 6.5 feet.

FOV: The Zhumell monocular is stated to give you a higher field of view over a distance of 300+feet and also at a distance of 65 feet. This feature could make it easy to spot and view continually moving objects at variable speeds. You may experience the benefits of this feature while viewing baseball and soccer games from a distance. Ball spotting and following it through its motion could become comfortable with the help of the Zhumell monocular.

Similarly, this feature could be helpful while you are engaged in bird watching. You could focus on them while they are resting and moving unpredictably on tall trees.

How does it Compare  

The other products which could come close to the features of the Zhumell monocular are the Orion monocular. Both the monocular devices seem to have nearly the same design specifications regarding object lens, length, exit pupil, and eye relief. 

Where Orion Scores

orion 10-25x42 waterproof monocular
  • Close Focus: The close focus length of Orin is stated to be 2feet, while the Zhumell monocular has a narrow focus of 6.5 feet.  However, the practical application need of a monocular could start after a distance of 5 to 6 feet.
  • Wrist Strap: The Orion monocular is stated to have a firmly attaching wrist strap for excellent grip. The inbuilt feature of the Zhumell monocular may not include the feature, but it is reported to have rubber armor with comfortable housing for excellent grip.

Where Zhumell Scores

zhumell 10-25×42
  • Focus Style: The focus style of Zhumell monocular is stated to be versatile while that of Orion is stated to be centered. That means the linear and angular field of view could be higher for Zhumell compared to the Orion. 303feet of Zhumell compared to 126feet of Orion if you wish to go by numeric values.
  • Image Clarity: According to the user reviews, the magnification, brightness, and image clarity of the Zhumell monocular are stated to be better than those of the Orion when it comes to viewing during the early morning and late evening hours.
  • Eye-Relief: Zhumell monocular could score over in eye relief due to its variable value between 14-9.5mm, while it is stated to be fixed at 14.5mm for Orion.

Best Pirate Telescope

Best Pirate Telescope

The pleasures of working with vintage telescope could be experienced when you choose the metallic alloy based products from the 18th and 19th century models. Apart from entertainment they offer you high aesthetics, good quality design and long lasting functionality features. They are recommended for hobby bird watching, travel, ocean exploration and other recreational activities. Some of the most commonly recommended models from them are in the list.

Zoomable Vintage Pirate-Adjustable v1

Overview of Specifications and Functions

In an era of the most advanced monocular, binocular and range finders you can still see a place for the vintage model telescopes. The specifications of the telescope can be defined with respect to its design, operational features and aesthetic features.

Design of the Pirate Telescope

  • The material of the telescope is mostly aluminum, brass, copper and their alloys or high quality engineering grade plastic. The external body structure is in the tubular model with multiple tubes inserted into one another in order of decreasing diameter. All these tubes with smaller diameters are made to collapse ino the largest diameter tube.
  • The optical part of the design includes the objective lens, series of relay lenses, field lens, an eye lens and the exit pupil. The lenses are optically aligned with each other along the optical axis of each lens.
  • The main tube (also known as the barrel) is the outermost protective layer which is made waterproof and stress proof to give a long life. The diameter of the main and sub barrels vary according to the diameter of the lenses which are installed into the telescope.
  • Installation of prisms is an added option which you can find in the models of the mid 19th century. Earlier to that there seemed to be no system of prism insertion. The most commonly used design of the prism is pentagon shaped model with a single roof surface and four reflecting surfaces aligned to each other in varying angles. Irregular shaped (heptagon or hexagon) prisms are also said to be used with a single roof surface and multiple reflecting surfaces.
  • The inner part of the pirate telescope has many parts and accessories. One such part is said to be the raised key which is supposed to be located within the inner part of the core barrel, running parallel to it.
  • The inner lenses are said to be held in their respective positions with individual notches which are attached to their rear ends. The alignment of these lenses with each other is said to be made in such a manner that the light entering from one of the main lens and reaching the exit pupil is free from astigmatism, an error in quality of the image.

Operational Features of the Pirate Telescope

  • The main component of the operational part is said to be the lens. Most commonly used number of lenses is four (two relay lens and one eye lens) or five (three relay lens with one eye lens) in addition to one field lens.
  • The aperture diameter of the lenses are said to be inversely proportional to the angular resolution. Reduction in diameter is directly proportional to the reduction of chromatic anomaly improvement of image quality.
  • Object lens is the part through which reflected light from the target object enters the telescope. It passes through the relay lenses, prism and the field lens before entering the field lens and the exit pupil. Focal length of the lenses could be varied in order to eliminate the blurriness and bring in clarity by focusing the 7 colours (waves) of the split light.
  • Magnification factor of the lens assembly is said to be closely related to the field view which is said to be variable from few hundred meters to more than one thousand meters. Most commonly used magnification is 8X and its multiples.

Aesthetic Features of the Pirate Telescope

  • Most commonly used outermost barrel is made from brass. This is an alloy made from zinc and copper. Some other forms may also use bronze. They are said to be good for the purpose of decoration with multiple designs and dyed colours.
  • You could also find finely carved wood being used as the outermost barrel covering. The inner overlapping barrels are usually coated with rustproof alloy. The end of each barrel is fitted with a brass ring in which the relay lenses are fitted with screws.

Applications of Pirate Telescope

You may use the pirate / navigation telescope for recreational purposes, bird and wildlife watching and during travel.

Recommended Product Reviews

Waterproof Monocular 25x30 Zoomable Vintage Pirate-Adjustable Telescopic Monocular Optics Telescope

Zoomable Vintage Pirate-Adjustable v2

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Key Features

  • The device is said to be made of original aluminum alloy. The top layer of the barrel is said to be made from copper plating to give a vintage type of outlook.
  • The magnification part provided by the lens assembly is said to be optimal for covering range of view field up to one thousand meters.
  • The monocular has optimal contraction and extended lengths to match with the maximum view field.
  • The lenses are made from the modern technologies to reduce aberration and controlled sets of achromatic and bi-convex low dispersion quality glass


  • The outer most barrel is said to be made of light weight aluminum alloy and rustproof copper plating. The design of the inner barrels and the alignment of lenses in the optical axis are said to be of monocular quality. They are supposed to have the characteristics of reduced back reflection.


  • The lenses are said to have no element of coating. Since the application areas are said to be mostly for recreational purposes there seems to be no scope for using rangefinder quality lens.
15 Handheld Brass Telescope

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Key Features

  • This device is said to be made of high quality brass with leather cover for the handheld parts.
  • According to the manufacturer the device is said to have optic lenses installed. This is said to be almost compatible with a basic monocular.
  • ​The lenses are said to be highly back refection proof to provide high resolution image views from the exit pupil.
  • The construction of the telescope body is said to be strengthened by the use of copper.


  • Brass construction with rustproof coating is said to be the main feature of the telescope which is embedded with high quality optic grade lenses.


  • This is supposed to be the basic version of a monocular with no features for night vision and rangefinder features.
Black Gold Pirate Telescope

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Key Features

  • This device is said to be used as a toy for gaming purposes. There is no specification about the type of lens used hence it is assumed that optic class lens may not be used in this device.
  • The device is said to be made from high quality unbreakable plastic material with concentric inner barrels which could be collapsed.


  • This device is said to be highly useful for dramatics and games.


  • This device is said to have no features for being used for outdoor applications of any type.
Portable Spyglass Waterproof

Our Rating:

Key Features

  • This device is said to be made from high quality brass and rustproof coating of the alloy on all the barrels.
  • The device is said to have night vision capability.
  • ​The device is said to be embedded with optic class lenses for outdoor viewing applications. Hence the magnification feature is supposed to be of professional class.
  • ​Features like blurriness elimination, focal length adjustments, enhanced image clarity and enhanced field view.


  • The device is said to give sharp image with the help of high resolution object lens, combination of relay lens and the eyepiece.


  • The device is said to have no option for prism embedding and night vision.
6 Handheld Brass Telescope

Our Rating:

Key Features

  • This device is said to be the basic version of the navigation telescope with distance viewing capability.
  • The barrels are said to be made with rustproof quality brass metal. The design of the device is said to be modeled on the vintage style.


  • The device is said to be made molded in the classical design which might be useful for usage when you travel with family and friends for distance viewing.


  • Since the device is said to be for basic outdoor viewing purposes only, there seems to be no added features that could make a high end navigation telescope or a monocular.


Since the list of devices is said to be mainly for recreational purposes, the purpose of usage is said to determine the one which might be recommended. However from the list of available features, it might be concluded that the device Handheld Brass Telescope VAKO Portable Spyglass Monocular Collapsible Pirate Telescope could be recommended.

  • The device is said to be embedded with high quality optic grade lens with night vision feature.
  • The magnification might not be of the high end, but when you see the aesthetic and functional scope of the others this is said to be good to be recommended.

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