INDUSTRY COMPONENT

Bayonet Mount

A mechanical interface system for attaching and securing lenses to camera bodies or optical devices with quick twist-lock functionality.

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Component Specifications

Definition
A bayonet mount is a precision-engineered mechanical coupling system used in optical equipment, particularly in cameras and lens barrels, that enables rapid attachment and detachment of lenses through a twist-lock mechanism. It consists of a male mount on the lens with protruding lugs and a female mount on the camera body with corresponding slots and a locking ring. The system provides secure alignment, electrical contacts for communication between lens and body, and maintains precise flange focal distance for optical performance.
Working Principle
The bayonet mount operates on a twist-lock principle where alignment lugs on the lens engage with corresponding slots on the camera body. A rotational motion (typically 30-90 degrees) moves the lugs behind locking surfaces, creating mechanical interference that secures the connection. Spring-loaded pins or balls provide tactile feedback and maintain tension. Electrical contacts embedded in the mount enable data transmission for autofocus, aperture control, and image stabilization.
Materials
Typically made from stainless steel (AISI 304/316), aluminum alloys (6061-T6, 7075-T6), or brass with nickel/chrome plating for corrosion resistance. High-precision components may use beryllium copper for spring contacts. Mounting surfaces are often hard-anodized for wear resistance.
Technical Parameters
  • Mount Diameter 46mm (Nikon Z), 54mm (Canon EF), 49mm (Leica M)
  • Rotation Angle 30-90 degrees depending on system
  • Locking Mechanism Spring-loaded ball detent or cam lock
  • Electrical Contacts 8-12 pin configurations
  • Flange Focal Distance 46.5mm (Sony E-mount), 44mm (Canon RF), 16mm (MFT)
  • Maximum Load Capacity 2-5kg depending on design
  • Operating Temperature -20°C to +60°C
Standards
ISO 10330, ISO 12233, DIN 19011, JIS B 7095

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bayonet Mount.

bayonet mount lens mount camera mount optical coupling twist-lock mechanism flange distance lens interface photographic equipment Bayonet Mount in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Lens Barrel

A cylindrical housing that holds and aligns optical lens elements within a lens assembly.

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Engineering Analysis

Risks & Mitigation
  • Mechanical wear leading to mount looseness
  • Corrosion of electrical contacts
  • Cross-threading during improper installation
  • Impact damage to alignment lugs
  • Thermal expansion mismatch in extreme conditions
FMEA Triads
Trigger: Wear on locking surfaces from repeated use
Failure: Lens detachment during operation
Mitigation: Regular inspection, use of wear-resistant coatings, proper lubrication of moving parts
Trigger: Corrosion of electrical contacts
Failure: Loss of communication between lens and body
Mitigation: Gold-plated contacts, environmental sealing, regular cleaning with contact cleaner
Trigger: Improper alignment during mounting
Failure: Damage to lugs or mount surfaces
Mitigation: Clear visual indicators, tactile feedback mechanisms, user training on proper mounting technique

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Flange distance: ±0.02mm, Mount diameter: ±0.01mm, Angular alignment: ±0.1°
Test Method
Coordinate measuring machine (CMM) verification, Go/No-Go gauge testing, Electrical continuity testing, Torque testing (1.5-2.5 Nm), Environmental testing (temperature/humidity cycling)

Buyer Feedback

★★★★☆ 4.9 / 5.0 (13 reviews)

"Great transparency on the Bayonet Mount components. Essential for our Computer, Electronic and Optical Product Manufacturing supply chain."

"The Bayonet Mount we sourced perfectly fits our Computer, Electronic and Optical Product Manufacturing production line requirements."

"Found 17+ suppliers for Bayonet Mount on CNFX, but this spec remains the most cost-effective."

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Frequently Asked Questions

What is the advantage of bayonet mount over screw mount?

Bayonet mounts provide faster lens changes (2-3 seconds vs 5-10 seconds for screw mounts), more secure locking with positive engagement, better alignment precision, and allow for electrical contacts for communication between lens and camera body.

Can bayonet mounts from different manufacturers be interchangeable?

No, bayonet mounts are proprietary systems with different flange distances, diameters, and electrical protocols. Adapters exist but may limit functionality. Major systems include Canon EF/RF, Nikon F/Z, Sony E, and Leica M mounts.

How does the bayonet mount maintain optical alignment?

Precision machining of mounting surfaces ensures consistent flange focal distance (distance from mount to sensor/film plane). The mechanical interference fit eliminates play, while alignment pins and precision tolerances (typically ±0.01mm) maintain optical axis alignment.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Base Bearings