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Message: <blockquote data-quote="PennineBirder" data-source="post: 3576645" data-attributes="member: 8848">Just to support the focus mechanism problem described by Troels above. I had the exact same issue on an early pair of Zeiss HT 8 x 42. The internal focus was very loose and moved as described here, under gravity. The focus wheel was also very free - no play in it but too smooth and moved easily without any pressure. Finally, there was a slight audible 'click' when the focus was moved backwards and forwards. These were clearly faulty and they went straight back to Zeiss for attention.Zeiss replaced the binocular with a new one as they were unused and the replacement is perfect with smooth but firm focus and no unwanted internal movement.Troels. Might I suggest your father sends his faulty SFs back to Zeiss who will fix this without charge?Peter</blockquote>