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British Gun Camera Harmonising Unit

Unit Harmonising
Ref n? 14A/1443
A[ir] [Crown Logo] M[inistry]
Serial n? 2324
W.M.C Ltd

This harmonising unit belongs to Type G45 gun camera (12 volts Ref. No. 14A/1389 or 24 volts, ref n? 14A/1340) made by Williamson Mfg. Co. Ltd. London & Reading.

A harmonisiing unit is a plug-in mirror unit used to align the G45 gun camera (which was mounted in the wing next to a machine gun) with the gun alignment of a Spitfire (and other fighters). The harmonising unit fitted into a circular access hatch on the top of the camera body, and projected outside the wing surface allowing the field of view to be checked. The camera mounting could then be adjusted to aim the camera lens, covering the point at which the bullet streams from the guns converged in front of the aircraft

The G45 gun camera was used throughout WWII by British fighter units and armament schools from 1939 onwards.

Note the Americanised spelling of 'harmoniZing' which was used by the RAAF during WWII. Note that the black wooden box has its own part number (14A/1439).

© Dirk HR Spennemann 2010, All Rights Reserved

August 1961
Canon 7 Rangefinder with 50mm f/0.95 Dream Lens

Marketed as the Canon "Dream Lens" this lens was developed as one of the standard lenses for the Canon 7 rangefinder camera. It had the largest aperture in the world for photographic lenses available in the market at the time.

It attracts a great deal of attention as a "dream lens", as it is four times faster than the human eye.

The lens mount is clip-on, 3-lug bayonet system like the Mirror Box II (cameras have S mount inside bayonet mount). The edge of the rearmost lens element is cut off to avoid friction with interlocking roller of range finder mechanism. It is Gauss type lens with 7 elements in 5 groups.

This image is my entry into using texture layers.