Additional Information on
Pre-AI version of the Nikkor 13mm Ultra-Wideangle Lens

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Introduced in December, 1975. This Non-Ai 13mm f/5.6 Nikkor version employed a unique lens construction of 16 elements in 12 groups to achieve its spectacular 118' picture angle (Compared the 15mm Nikkor-QD.C Auto f/5.6 which has a picture angle of 110°). Yet the lens is a true wideangle that capables of reproducing straight lines accurately, without the pronounced curvature effects common to fisheye lenses.

Pre-AI 13mmf5.6.jpg (10K) Loading.. Lens Structure.gif
Some of the best available prevailing Nikon optical innovation was used throughout in its design - Nikon close range correction (CRC) system was used for optimum performance at its closest focusing distance at 0.3m (1 ft). Additional optical merits of the 13mm lens include the evenness of illumination across the full frame. The lens exhibits little of -the light fall-off normally expected with a lens of this remarkably wide picture angle. Also, the application of NIC onto all its internal lens elements helps to enhance image quality, effectively while controlling flare and ghost which might otherwise decrease image contrast or contribute to inferior color rendition.

an Optical Construction file in new browser window: 22k Gif

Filters for this 13mm Nikkor lens were of special bayonet-mount Units (a set of four are provided) which individually fasten to the rear of the lens (However, the Ai version (1977) seemingly remained identical with this remarkable Nikkor ultrawide while the Ai-S version introduced in 1982 has a set of filters in different configuration.

Nikon guide to compatible focusing screen(s) selection and Depth of Field calculation chart for this 13mm Ultrawideangle lens. Download a file in a new browser window 56k.Gif


Focal Length
: 13mm
Maximum Aperture: f/5.6; Lens Construction: 16 elements in 12 groups
Lens Coating: Multicoated with NIC; Picture Angle: 118
Distance Scale: Graduated in meters and feet from 0.3m (1ft.) to infinity (
OO); infrared index is provide.
Aperture Scale: f/5.6 ~ f/22; Diaphragm: Fully automatic
Exposure Measurement: via full aperture method; meter coupling prong provided
Lens hood: Built-in scalloped type, Non-removable and built into front of lens
Filters: Provided with a set of four bayonet-mount filters for attachment to the rear of the lens; set includes Y49, O56, R60 and plain glass (N); one filter MUST be in place at all times
Lens Mount: Nikon bayonet mount; Dimensions: 115mm dia. x 101mm long; Weight: 1,240g
Accessories Supplied: Rear protective cap LF-I (108-00-401); 115mm slip-on front lens cap; hard lens case CL-14 with strap ( (108-03-308); 4 piece bayonet mount filter set, filter set case CA-2. Nikon Product Code for this discontinued item is No.108-03-143; Content appeared in this section is largely extracted from Nikon Sales Manual, 1974/1976;
NOTE: Starting serial number for this Non-Ai 18mm Nikkor ultrawide was believed to have been started with: 175021

Pre-Ai 13mm f/5.6 | Ai Nikkor 13mm f/5.6 | Ai-S 13mm f/5.6

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Recommended links to understand more technical details related to the Nikkor F-mount and production Serial Number: by: my friend, Rick Oleson by: Hansen, Lars Holst

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leofoo.Gif Co-developed with my web buddy, Rick Oleson® & LARs.Gif Denmark, Creator of the Nikon Repair Group Mailing-List; A contributing effort to Michael Liu's Classic Nikon SLRs and Nikkor optic site.

Credit: MCLau®, who has helped to rewrite some of the content appeared this site. Chuck Hester® who has been helping me all along with the development of all these Nikon websites; Lars Holst Hansen, 'Hawkeye' who shares the same passion I have; Ms Rissa, Sales manager from Nikon Corporation Malaysia for granting permission to use some of the official content; Ted Wengelaar, Holland who has helped to provide many useful input relating to older Nikkor lenses; Some of the references on production serial numbers used in this site were extracted from Roland Vink's website; Hiura Shinsaku from Nikomat Club Japan. Lastly, to all the good people who has contributed their own expeience, resources or kind enough granted permission to use their images of their respective optic in this site. It is also a site to remember a long lost friend on the Net. Note:certain content and images appeared in this site were either scanned from official marketing leaflets & brochures published by Nikon and/or contribution from surfers who claimed originality of their work for educational purposes. The creator of the site will not be responsible for may discrepancies arise from such dispute except rectifying them after verification. "Nikon", "Nikkormat", "Nippon Kokagu KK" & "Nikkor" are registered tradename of Nikon Corporation Inc., Japan. Site made with an Apple IMac.