Mir dating combroadcast
Concurrently with introduction of Nikon F, the shutter foil for Nikon SP was also changed from a fabric foil of habutae silk to titanium material.
To prevent blurring due to the activation of the mirror, one of the drawbacks of SLR cameras, we repeated the studies using the specifically developed shake recording device and succeeded in suppressing blurring to the lowest possible level, close to that achieved by the rangefinder cameras.
The 35 mm (135) format rangefinder focal-plane shutter cameras, typified by our Nikon SP (1957) and S3 (1958), featured sophisticated design and greater portability, and nearly reached perfection in terms of mechanism.
Only the three principal components, mirror box, pentaprism and bayonet mount, were newly developed, and the other components were virtually identical to those in SP/S3.Then, in the development of SLR cameras, we planned to adopt the same body mechanism as in the SP/S3 as a rule (without any change made to the layout and geometry of the shutter button, film wind-up lever and other components), except for the viewfinder and other parts essential for SLR cameras, with the intent to implement parallel production with SP and the basic model S3.In February of 1957, the order was issued for prototyping 3 sets, signaling the start of the development of Nikon F.Particularly, the practical application of a motor drive in the SLR camera was first in the world (continuous shooting available at a rate of up to 3.6 frames per second).Moreover, Nikon F, which contained many moving parts and complicated mechanisms, was repeatedly subjected to various tests including endurance, heat run, low temperature durability and vibration similarly to the tests for the S series, to ensure that it could withstand hard use under any conditions and provide a highly reliable camera.