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Message: <blockquote data-quote="BruceH" data-source="post: 3520654" data-attributes="member: 106398">That is different from what I have heard.  I was told by two different Zeiss folks that the grey models made somewhere in the last year had the improved tolerances in the focus mechanism.  That does agree with my own personal experience.  I have an older 10X and one of the last 8X units.  The 10X shows a little roughness when going from infinity to close whereas the 8X does not. As far as optical differences, I have not noticed any.  It is difficult at the consumer level to tell when a Zeiss binocular was made.  The serial number structure does not say.  However the grey SF models had a short shelf life for the first year so one can get an idea from when it was sold.  I did compare side by side a 10X unit sold in May of 2015 to one from December of 2015 and could see no difference.  I have continually looked through various SF units since the introduction and did not pick up on any changes.  I am at a loss why Super Duty has such a different experience.  A bad unit?  Different viewing conditions?  Bad setup (IPD, diopter, fouled lens, etc)?  Just a bad day?  I do not remember if the first unit SD viewed was a one time shot or if he had it for several or more days.  If he had it for an extended period, then he should of had it dialed in and had various viewing conditions which indicates even more that there was something different about the first unit.</blockquote>

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