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Reverse Engineering the 1979 Chinon CM-4 Film Camera Specifications

By

manoloesparta

7mo ago· 21 min readen

Summary

The author purchases a 1979 Chinon CM-4 film camera in Tijuana and decides to reverse engineer its specifications before using expensive film. The article documents a detailed three-step plan to understand the camera's technical specifications, including examining Michael Butkus's comprehensive documentation about the Chinon CM-4. The content explores the camera's mechanical design, specifications, and the process of learning how vintage film cameras work through systematic analysis rather than trial-and-error film usage.

Key quotes

· 4 pulled
I bought a 1979 Chinon CM-4 film camera in Tijuana. Film is expensive, so before wasting a roll I decided to learn exactly how this machine works — by taking apart its specs, one line at a time.
So here is my three step plan: Understand what I really have in my hands.
Michael Butkus created a comprehensive document that covers the details and specifications of the Chinon CM 4.
Chinon was a small Japanese maker of SLRs in the '70s. In 2004 Kodak bought them, but in 1979 this was just another independent company making clever machines.
Snippet from the RSS feed
I bought a 1979 Chinon CM-4 film camera in Tijuana. Film is expensive, so before wasting a roll I decided to learn exactly how this machine works — by taking apart its specs, one line at a time. So here is my three step plan Understand what I really have

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