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Product guide

SynoRiver 10-30x50 HD Monocular with Phone Holder and Tripod

The SynoRiver 10-30x50 HD Monocular is a manual-focus monocular listed with adjustable 10–30x magnification and a 50 mm objective lens. Its phone holder and tripod are intended to support hands-free viewing and smartphone capture, while listing inconsistencies mean some optical details should be confirmed before purchase.

At a glance

  • The listing describes adjustable 10–30x magnification with a 50 mm objective lens for viewing distant subjects.
  • A smartphone adapter and rotatable tripod are claimed as included, providing an option for supported viewing and phone capture.
  • BAK4 prism and fully multi-coated optics are stated in the product description.
  • The listed weight is 248 grams, with a rubber-armoured design described for outdoor handling.
Price
$42.49Save 15%

Reference price: $49.99

Price checked: 13 Nov 2026

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Pros and cons

Pros

  • The phone adapter and tripod offer a hands-free setup and a way to position a compatible smartphone for capture.
  • The 10–30x zoom range gives more magnification flexibility than a fixed-power monocular, according to the listing.
  • The stated 248-gram weight is a practical carry consideration for hiking and travel.

Technical specifications

21 specifications
Identity
BrandSynoRiver
Model10-30x50 HD Monocular
Optics and handling
Focus typeManual Focus
Objective lens diameter50 Millimeters
Zoom ratio listed30 multiplier x
CoatingMulti-Coated
Prism typeBAK4
Magnification10-30x
Field angle5.6° at 10x - 2.7° at 30x
Field of view130 m/1000 m
Near focal distance5 m
Exit pupil diameter5.6 mm
Exit pupil distance15.1 mm
Eyepiece diameter23 mm
Optics typeRoof Optics
Eyecup typeRotating
Dimensions and installation
Dimensions listed50D x 10W x 30H millimetres
Weight listed248 Grams
Phone compatibilitySmartphone
Construction
MaterialMetal + High quality rubber
Waterproof systemFill-nitrogen Waterproof, Anti-fogging

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: dimensions are given as 50D x 10W x 30H millimetres while optical tube length and focal length are each listed as 10 millimetres, and field of view appears as both 130 Meters and 130 m/1000 m. The zoom-ratio entry says 30 multiplier x while product copy describes 10–30x. The title calls the build waterproof, dustproof and shockproof, while feature copy says water-, dust- and shock-resistant. Confirm the intended measurements and protection claims before buying.

Who is it for?

A good fit for

  • Birdwatchers, hikers and travellers seeking a compact monocular with variable magnification.
  • Buyers who want a listed phone adapter and tripod for smartphone capture or steadier viewing.

Less suited to

  • Buyers who need independently confirmed optical measurements or clearly specified water and impact protection.
  • Anyone seeking a binocular or a product with verified low-light performance.
SynoRiver 10-30x50 HD Monocular with Phone Holder and Tripod · photo 2
Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 6 ratings
  • 5 stars43%43%
  • 4 stars34%34%
  • 3 stars23%23%
  • 2 stars0%0%
  • 1 star0%0%

The supplied aggregate ratings are mixed, with ratings spanning three to five stars. This small sample does not identify what buyers liked or disliked, so it cannot establish optical performance, durability or phone-adapter results. Use the stated magnification, weight and accessory claims as listing information, and verify the inconsistent details before choosing it for demanding use.

Frequently asked questions

What magnification does the listing claim?

The title and product description state adjustable 10–30x magnification. A separate zoom-ratio field says “30 multiplier x”, so confirm the intended zoom range with the selected listing.

Are a phone holder and tripod included?

The title and feature copy claim an adjustable phone holder and rotatable tripod are included, but no explicit package inventory was supplied. Check the selected listing's package details.

Is this monocular waterproof?

The listing uses varying protection descriptions, from waterproof to water-resistant, and also claims dust and shock protection. These claims are not consistent, so confirm the protection level before relying on it outdoors.

SynoRiver 10-30x50 HD Monocular with Phone Holder and Tripod · photo 3
Additional product photo 3

Alternative options

Product details in Markdown