Not really. I just like the look of my RTS with the brown leather half-case and the green Sigma lens. The Contax RTS is from 1975 – I’m not sure when Sigma made these green body lenses.

Here is what Sigma had to say about the lens at its introduction (10 Feb 1986). “The world’s shortest Apochromatic High-Speed Telephoto lens. One-Touch zoom, Helical focusing, which has an advantage for using a polarizing filter. The lens will supply together with an Achromatic Macro Lens for High-Quality close-up photography.” I can’t be 100% certain that my lens is this lens as described but it could be. Further reading hints that ‘APO’ originally meant ‘Advanced Performance Optics’. Either way ‘APO’ indicated that the lens had low dispersion glass.

Since film is so expensive to shoot with I believe I’ll get a FotodioX C/Y to FX adapter to use this lens on my Fujifilm X-T2. I’m interested to know when Sigma first produced green lenses. Any info would be appreciated. Thanks for stopping by, Chris

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