02 — Binoculars · Wholesale Manufacturer

Sport, Marine &
Astronomy
Binoculars

Factory-direct binoculars from Ningbo, China. Roof prism and porro prism designs, 6×25 to 20×80. BAK-4 glass, FMC coatings, IPX7 waterproofing. Full OEM private label. CE certified. MOQ from 50 units.

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35+
Binocular models
6×25
to 20×80 range
50u
Minimum OEM order
– + 42mm FMC BAK-4 Objective Phase Coated Prism Central focus
Optical technology

Roof prism vs porro prism — explained

The prism type fundamentally determines the binocular's shape, optical performance and price point. Both types use BAK-4 glass in our mid-range and premium models.

Obj. Eye. Schmidt-Pechan Prism Straight-through light path
Roof Prism
Schmidt-Pechan or Abbe-König design
The Schmidt-Pechan roof prism uses a complex multi-surface prism that folds light back along the same axis. The result is a compact, straight-through barrel with objectives and eyepieces perfectly aligned. Requires phase coatings (P-coating) to maintain contrast — our premium models include this as standard.
Slim, streamlined body — premium feel
Objectives and eyepieces on same axis
Easier to focus with one hand
More rugged and sealed against weather
Preferred for high-end retail segment
More expensive to manufacture
Requires phase coating for peak contrast
Best for: Birding · Wildlife · Hunting · Premium retail
lateral offset Obj. Eye. Porro Prism Pair Objectives wider apart than eyepieces
Porro Prism
Classic W-shape, offset barrel design
Two right-angle prisms arranged at 90° to each other create the characteristic W-shaped body. The objective lenses sit wider apart than the eyepieces, giving a natural 3D stereo effect and large, bright field of view. No phase coating needed — the reflections are total internal reflection.
Excellent optical performance at lower cost
Wide, bright field of view
Natural 3D stereo effect from wider baseline
No phase coating required (TIR reflections)
Preferred for astronomy and marine
Wider, heavier than roof prism
Less weather-sealed than modern roof designs
Best for: Astronomy · Marine · Budget · Long-range
Full product range

Complete binocular specification table

All models OEM-ready with custom branding, packaging and instruction manuals. CE certified. Lead time 25–40 days from artwork approval.

ModelTypeMagnif.ObjectivePrismCoatingFOV @1000mExit PupilClose FocusWeightIP RatingMOQ
ZH-B8x42 BEST SELLERRoof8×42mmBAK-4 PhaseFMC + Phase131m5.25mm1.5m680gIPX750u
ZH-B10x42Roof10×42mmBAK-4 PhaseFMC105m4.2mm2.0m710gIPX750u
ZH-B8x32Roof8×32mmBAK-4 PhaseFMC + Phase140m4.0mm2.0m560gIPX6100u
ZH-B10x32Roof10×32mmBAK-4 PhaseFMC108m3.2mm2.5m590gIPX6100u
ZH-B8x56 LOW-LIGHTRoof8×56mmBAK-4 PhaseFMC + Phase126m7.0mm2.5m980gIPX730u
ZH-B12x50Roof12×50mmBAK-4 PhaseFMC + Phase88m4.2mm3.0m850gIPX750u
Porro Prism Models
ZH-P10x50 ASTRONOMYPorro10×50mmBAK-4FMC114m5.0mm4.0m880gIPX4100u
ZH-P7x50Porro7×50mmBAK-4FMC131m7.1mm3.5m840gIPX4100u
ZH-P8x40Porro8×40mmBAK-4FMC142m5.0mm3.0m720gIPX4100u
ZH-P20x80 GIANTPorro20×80mmBAK-4FMC65m4.0mm8.0m2100gIPX430u
ZH-P16x70Porro16×70mmBAK-4FMC72m4.4mm6.0m1650gIPX430u
Marine / Waterproof
ZH-M7x50 MARINEPorro7×50mmBAK-4FMC131m7.1mm8.0m960gIPX750u
ZH-M7x50C COMPASSPorro7×50mmBAK-4FMC131m7.1mm8.0m1040gIPX750u
Compact / Travel
ZH-C8x25 COMPACTRoof8×25mmBAK-4FMC114m3.1mm2.5m295gIPX4200u
ZH-C10x25Roof10×25mmBAK-4FMC92m2.5mm3.0m310gIPX4200u
ZH-C8x21Roof8×21mmBK-7MC108m2.6mm3.0m230g—500u
ZH-C12x32Roof12×32mmBAK-4FMC78m2.7mm4.0m480gIPX4100u
Optical engineering

Key optical parameters explained

Understanding exit pupil, field of view, twilight factor and eye relief helps match the right model to each market segment.

Exit Pupil
Objective ÷ Magnification = Exit Pupil (mm)
Ø 8×42 → 42÷8 = 5.25mm exit pupil Human pupil: 2–7mm (varies with light)
The exit pupil is the disk of light that exits the eyepiece. For daytime use, 4–5mm is ideal. For dawn/dusk hunting or astronomy, 5–7mm matches the dilated human pupil. BAK-4 prisms produce a perfectly round exit pupil; BK-7 produces a slightly clipped square shape.
Field of View
Angular (degrees) or Linear (metres at 1000m)
131m 7.5° 1000m 8×42: FOV 7.5° = 131m @1000m
Field of view (FOV) is measured in degrees or linear metres at 1000m. Higher magnification reduces FOV. Wide-angle eyepieces (apparent FOV >60°) can deliver wider real FOV. For birding, >120m @1000m is preferred. For astronomy, wider is always better.
Twilight Factor
√(Magnification × Objective) — low-light indicator
TF = √(8 × 42) = √336 = 18.3 Higher TF = better in low light
Twilight Factor = √(magnification × objective diameter). A TF above 17 indicates strong low-light performance. Our 8×56 achieves TF 21.2 — excellent for dusk and dawn hunting. Marine 7×50: TF 18.7. This is the primary spec for crepuscular wildlife observation.
Eye Relief
Distance from eyepiece to full field of view
16mm Eyeglass wearer ≥14mm needed for eyeglass wearers
Eye relief is the distance from the last eyepiece element where you can see the full field of view. Eyeglass wearers need minimum 14mm eye relief. Our premium roof prism models have 16–18mm. All models include twist-up eyecups with click stops for eyeglass and non-eyeglass positions.
Market segments

Right binoculars for every use case

Match the specification to the end user. Each segment has different priority specs — our range covers all wholesale markets.

Birding & Wildlife
8×42 or 10×42 Roof Prism
Phase-coated BAK-4 glass is essential. Wide FOV (>120m @1000m), close focus under 2m, waterproof IPX7. Lightweight body under 750g. Key retail segment globally.
Hunting
8×42, 10×42 or 8×56
High twilight factor for dawn/dusk use. Waterproof and rugged. 8×56 for dense forest (low light). Roof prism preferred for compact carry. Long eye relief for comfort.
Marine & Sailing
7×50 Porro with Compass
7×50 porro gives maximum exit pupil (7.1mm) for a dark boat deck. Fixed focus or central focus. Illuminated compass reticle. IPX7 waterproof, floating-rated. Rubber armour grip.
Astronomy
10×50 or 20×80 Porro
Large objectives for maximum light gathering. Porro prism for widest FOV. 10×50 is the standard entry point; 20×80 must be tripod-mounted. Tripod adapter included.
Lens coating grades

Optical coatings — what to specify

Lens coatings determine light transmission and image contrast. Always specify FMC for mid-range and above. Phase coatings are only needed on roof prism models.

Grade 4 · Entry
Coated (C)
Single anti-reflection layer on at least one surface. Found only on budget entry-level models. Visible reflection in lens.
~80%
Light transmission
Grade 3 · Mid-entry
Multi-Coated (MC)
Multiple layers on some surfaces. Better than single coat. Used in our ZH-C8x21 entry compact. Acceptable for casual use.
~88%
Light transmission
Grade 2 · Standard
Fully Multi-Coated (FMC)
Multiple layers on EVERY air-to-glass surface. The standard for all our mid-range and above models. Bright, high-contrast images.
~95%
Light transmission
Grade 1 · Premium
FMC + Phase Coating
FMC on all surfaces PLUS a phase-correction coating on the roof prism. Eliminates interference fringes in roof prisms. Required for premium birding/hunting models.
~98%
Light transmission
Sourcing guide

How to choose the right binocular model

A practical step-by-step guide for procurement teams and buyers selecting from our range for the first time.

01
Define your end user
Birding, hunting, marine, astronomy, sports or general purpose? Each segment has a "standard" specification. Birding = 8×42; Marine = 7×50; Astronomy = 10×50. Starting from the end user avoids expensive mismatches.
Ask us: "What spec is most popular in [Germany / US / Japan]?"
02
Choose prism type
Roof prism for a premium, compact product. Porro prism for maximum optical value per dollar — excellent for astronomy and marine where performance matters more than aesthetics.
Roof prism adds 15–20% cost vs equivalent porro, but commands 30–50% higher retail.
03
Specify BAK-4 + FMC
For any mid-range or premium product, always specify BAK-4 prism glass and FMC (Fully Multi-Coated) lenses. These are non-negotiable for competitive optical performance. Add phase coating for roof prism premium models.
We include BAK-4 + FMC as default on all models ZH-B8x32 and above.
04
Set waterproofing level
IPX7 (1m submersion) for hunting and marine. IPX6 (pressure water) for general outdoor. IPX4 (splash) for casual use. Higher IP ratings add 5–10% to unit cost but significantly increase perceived quality.
All IPX6+ models are nitrogen-purged to prevent internal fogging.
05
Plan your OEM branding
Logo on barrel, eyepiece caps and carry case. Custom instruction manual in your language. Custom retail packaging available. Minimum 50 units for branded production. Sample turnaround 7–10 days.
NDA signed before we receive any artwork files.
06
Arrange pre-shipment inspection
We perform 100% optical and mechanical QC on every unit. For new clients, we recommend a third-party inspection (SGS, Bureau Veritas) before first shipment. We welcome factory audits.
CE Declaration of Conformity provided with every shipment.
Binoculars FAQ

Common questions from importers

What is the difference between BAK-4 and BK-7 prism glass?
BAK-4 (Barium Crown glass) has a higher refractive index (nd=1.569) than BK-7 (nd=1.516). This higher refractive index means total internal reflection occurs for all light rays, giving a perfectly round exit pupil with no vignetting. BK-7 produces a slightly squared exit pupil at low magnifications. BAK-4 is mandatory for any mid-range or premium binocular. All Zhind models from ZH-B8x32 upward use BAK-4.
Why does a roof prism need phase coatings but a porro prism doesn't?
In a porro prism, all reflections are total internal reflections (TIR) — the light path geometry ensures the beam reflects off the glass-air interface at an angle beyond the critical angle. This preserves phase relationships. In a Schmidt-Pechan roof prism, one reflection occurs at less than the critical angle, so some light is transmitted rather than reflected. This introduces phase shift between different components of the light wave, reducing contrast and resolution. Phase correction coatings (P-coatings) restore this lost contrast.
What magnification should I recommend to customers?
For hand-held use without image stabilisation, 8× is the sweet spot for most users. Image shake becomes problematic above 10× without a tripod. For birding: 8×42. For hunting: 8×42 or 10×42. For astronomy: 10×50 hand-held, 20×80 tripod-mounted. For marine: 7×50 (lower magnification reduces wave-induced shake). For compact travel: 8×25.
How does nitrogen purging prevent fogging?
Internal fogging occurs when warm, moist air inside the binocular condenses on cold internal lens surfaces during temperature changes. Nitrogen purging replaces all internal air (which contains moisture) with dry nitrogen gas before sealing. Since nitrogen contains no moisture, there is no water vapour to condense regardless of temperature change. All our IPX6 and IPX7 models are nitrogen-purged.
Can you produce binoculars with image stabilisation?
We currently produce optical IS (image stabilisation) binoculars in 10×42 IS and 12×50 IS configurations. The IS mechanism uses gyroscope-stabilised prism elements that compensate for hand tremor at higher magnifications. MOQ is 20 units. Pricing available on request. These models carry additional FCC certification for the electronics.
What HS code applies to binoculars for import?
Binoculars (both prism types) fall under HS code 9005.10. This covers binocular prism telescopes. Monoculars fall under 9005.80. Our export team includes the correct HS code on all commercial invoices and provides the CE Declaration of Conformity and test reports needed for customs clearance in EU, US, UK and other regulated markets.
OEM & Private label

Your brand on
our precision glass

We manufacture binoculars under hundreds of brand names globally. From small independent brands to major retail chains — full OEM with IP protection and NDA.

01
Choose model & specification
Select from our range or specify custom: aperture, prism type, coating grade, IPX rating, colour.
02
Send artwork for branding
Logo on barrel, caps and case. Custom manual. NDA signed before receiving artwork. 7-day sample production.
03
Approve sample & place order
Review branded sample. Request changes if needed. Place production order. 25–40 day lead time.
04
Export with full CE documentation
CE DoC, RoHS, packing list, HS code 9005.10, commercial invoice. FOB Ningbo or CIF/DDP.
Binocular CategoryOEM MOQLead Time
Compact 8×21 / 10×25500 units20–28 days
Standard 8×25 / 10×25 Roof200 units22–30 days
Mid-range 8×32 / 10×32 Roof100 units25–35 days
Premium 8×42 / 10×42 Roof50 units28–38 days
High-end 8×56 / 12×50 Roof30 units30–42 days
Porro 10×50 / 7×50 / 20×8050–100 units25–35 days
Marine 7×50 with compass50 units30–40 days
Image stabilisation models20 units35–50 days

"Zhind's 8×42 is our best-selling birding binocular. Phase coatings at this price point are extraordinary. We've reordered six times."

T.K. — Online optics retailer, Germany

Ready to source binoculars for your market?

Send us your target spec — magnification, prism type, IP rating, budget — and we'll reply with a full quote within 24 hours from our Ningbo export team.

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