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Message: <blockquote data-quote="BruceH" data-source="post: 3700872" data-attributes="member: 106398">Zeiss made a change to the eye cups on the Zeiss SF when they replaced the grey/gray body with the black body.  The only change was to have two intermediate positions in the black model version compared to only one intermediate position in the original grey version.  Dimensions (length) are the same in the full down and full extension positions.  The newer 4 position eye cup is interchangeable with the original 3 position design.  Zeiss USA (and most likely other regions) will send a free replacement to those who want to swap out the original.  As far as the focus mechanism, there were some reports where on occasion a grey model would exhibit some stiction in the focus mechanism.  Zeiss addressed this by improving the tolerances of the related parts mid stream in the production of the grey models.  This carried over to the black body change.  Anyone with a grey model having stiction issues should contact Zeiss.  Optics between the grey and black versions are unchanged.</blockquote>