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* Item pictured for illustrative purposes only, actual item not pictured. See ‘Notes’ next to grade for included items.

Nikon PK-13 Auto Extension Ring 27.5mm (55 Micro AI (1:1)

Model #216664
  • $39.00

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Our Grading System
New in box complete with manufacturer's USA warranty. Not previously owned or used.
Essentially new with no signs of use. In manufacturer's packaging with original accessories and instructions.
Barely used with virtually no traces of wear. Only the closest inspections will reveal slight use. Perfect glass, but the box and accessories are usually not included.
Lightly used with very limited signs of wear. Exceptionally nice but may have slight wear on finish visible. Glass will be very clean.
Noticeably used with average signs of wear. Shows moderate wear for the age of the item, with the possibility of dings or blemishes. Glass may have slight blemishes but will not affect picture quality.
Frequently used with above-average wear. More than average wear for the age of the item, and may have dents, dings or finish loss. Glass may have marks or blemishes, but should not affect picture quality.
Heavily used with extensive visible wear. Equipment is rough, with multiple impressions in the finish, excessive finish loss and brassing. Glass will have marks, fungus and/or haze which could affect picture quality. Not covered under KEH warranty.
Non-functional or damaged. Equipment will not work. Usable for parts. Not covered under KEH warranty and non-returnable.
EX+ Excellent Plus
With Caps
$47.00
Only 1 left!
EX Excellent
With Caps
$45.00
Only 1 left!
EX+ Excellent Plus
$39.00
Only 1 left!
EX Excellent
$37.00
Only 3 left!

* Item pictured for illustrative purposes only, actual item not pictured. See ‘Notes’ next to grade for included items.

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Nikon Auto Extension Rings PK and PN fit between the camera body and lens either individually or in combination. The extension rings have no optics. The PK and PN rings are used in manual focus mode and are considered non-CPU lens attachments. 

The PK-13 Auto Extension Tube allows a lens to focus closer than its normal set minimum focusing distance. The PK-13 provides 27.5mm of extension. The rings can be used alone or in combination.

An AI Nikkor will preserve automatic diaphragm and meter coupling functions, letting you compose, focus and meter at wide apertures. 

Brand Name Nikon
Focus Type Manual focus (only)
Lens Mount Nikon F Mount Ai