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During 1967 through 1969 KMZ built an automatic **-cast moulding line, allowing mass camera production. Camera production switched to the M42×1 thread (also known as Praktica thread) and an instant-return mirror was also developed. This led to one of the most famous Zenits — Zenit-E which saw (including its subtypes) over 12 million produced. A heavy and tough camera with a mechanism that was of exceedingly ** design along the lines of "what isn't there, can't go wrong". Automatic diaphragm functionality was not available until the introduction of the Zenit-EM, which used a direct mechanism linking the shutter release button to the aperture mechanism, significantly increasing the effort required to release the shutter. Production included both M39×1 and M42×1 mounts for the Zenit E and Zenit B models. Later models were only produced in the M42×1 with the Pentax K mount available for the latest models. |
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