Has anyone heard of Carl Zeiss MC Macro Jena zoom lenses?
I have just purchase one (second-hand) in an Olympus OM mount, single-touch style, 28-200mm f/3.8-5.6.
It appears to be very well made (in Japan, under licence from Carl Zeiss), and the anti-reflection coatings (bloom) on both front and rear elements are extremely effective. Looking through the viewfinder, the image appears to be very clear and bright.
I have, as yet, to put a film past it (one ready to go).
I wondered if anyone could direct me to a site giving some details about these lenses and their history, etc.
Thanks. 


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