Nikon F Photomic Tn

A brief outline of the Nikon F Photomic Tn manual focus SLR film camera

This page is dedicated to the superb Nikon F Photomic Tn camera produced by Nikon from 1967 to 1968. The Nikon F Photomic Tn only differs slightly from the preceding Nikon F Photomic T camera. The change although small made the camera far superior in normal use, it changed the cameras light metering from average full frame metering to 60/40 centre weighed, the Nikkormat FTn and Nikon F Photomic Tn were the first Nikon cameras to use the centre weighed system and it was the primary exposure measurement on all subsequent Nikon 35mm SLR cameras until matrix metering was introduced with the 1983 Nikon FA.

In order to allow the visually almost identical Photomic T and Photomic Tn Viewfinder heads to be distinguished from each other Nikon engraved a "N" next to the meter power on switch. The only other obvious difference between the two heads is the addition of a small white push button switch in front of the meter power switch, this allows battery condition to be checked using the exposure meter as an indicator rather than finding out the hard way by an overexposed film.

As the Nikon F body is part of a camera system any post 1966 Nikon F body, or earlier if there is a red dot by the serial number, can be upgraded to a Nikon F Photomic Tn camera simply by changing the viewfinder head, the only better functioning F head is the FTn which replaced the Tn in the latter part of 1968. The difference between these two heads is primarily the speed at which lenses can be changed due to the adoption of semi-automatic aperture indexing - beneficial when a picture opportunity could be lost in seconds, or in a low visibility environment.

Photomic Tn Viewfinder

Basic specifications of the Nikon F Photomic Tn MF SLR Camera
Production period (later availability via stock)	1967 to 1968
Lens meter coupling type	Nikon prong ("bunny ears")
Maximum aperture coupling range	f/1.2 to f/4.5
ASA film speed range	ASA 20 to 1600
EV range at ASA 100	EV 2 to 17
Meter sensor type if applicable	TTL 60/40 centre weighed CdS photo sensor
Shutter type and curtain material	Horizontal Titanium foil focal-plane mechanical
Shutter speed range	1 to 1/1000 of a second + Bulb
Auto exposure modes available	None
Flash exposure type and maximum sync speed	Flash bulb & 1/60 sec Electronic flash sockets
Interchangeable focusing screens	Yes - 17 + others by third parties
Interchangeable viewfinder heads	Yes
Interchangeable backs	Yes - Bulk Film - Motor Drive - Polaroid
Film advance method	Single stroke lever
Motor drive or Auto winder availability	F36 or F250 motor drives
Film rewind method	Manual folding crank
Self Timer	Yes - 3 to 10 seconds
Battery type and number required	Two PX-625 1.3V mercury cells in head
Body weight without lens attached	840g with Tn viewfinder fitted

Nikon F Photomic Tn viewfinder head

Nikon
F Photomic Tn

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