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Rent NowNikon PK-13 Auto Extension Tube (27.5mm)
Vintage Manual Focus Macro Accessory
The Nikon PK-13 is a precision-engineered 27.5mm auto extension tube designed to fit between your Nikon SLR/DSLR camera body and lens. By increasing the distance between the lens elements and the camera sensor or film plane, it allows your lens to focus significantly closer than its normal minimum focusing distance, transforming standard lenses into capable macro tools. As a non-CPU mechanical attachment, the PK-13 contains no optical elements, ensuring that your lens’s native image quality and optical characteristics are perfectly preserved without any added glass degradation.
Key Features & Engineering
27.5mm Macro Extension: Provides a fixed 27.5mm of mechanical extension, allowing you to capture high-magnification close-up and macro photography with your existing lenses.
AI Meter Coupling & Auto Diaphragm: Fully supports AI (Aperture Indexing) Nikkor lenses, preserving automatic diaphragm control and light meter coupling functions. This allows you to comfortably compose, focus, and meter at the lens’s widest, brightest aperture.
Modular Compatibility: Part of Nikon’s legacy PK and PN series system, this tube can be used individually or stacked in combination with other rings to achieve even greater magnification ratios.
Zero Optical Degradation: Because the tube contains no glass elements, it introduces no optical distortion, chromatic aberration, or loss of edge-to-edge sharpness.
Item Condition & Notes
Cosmetic & Mechanical Condition: Good condition. The metal housing and bayonet mounts show light signs of normal use, with smooth mechanical locking mechanisms.
Operation: Manual focus operation required.
Missing Items: No front or rear caps are included with this item.
Technical Specifications
Accessory Type: Macro Extension Tube
Lens Mount Type: Nikon F Mount (AI Compatible)
Extension Distance: 27.5mm
Optical Elements: None (Hollow Tube)
Focus Control Type: Manual Focus / Non-CPU Attachment
