Cross sections, details, few technical images. Pay special attention to 25th, 26th, 27th frames.
Lens = "słoik" (jar) - a slang word for a lens in polish is a glass or a jar. In 2008 the first real jar with a K mount called "TREFmited" was built. It was a birthday gift for Tref. Sołtys was the author.
100 years of Pentax
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