claude_batmanghelidj Posted November 30, 2007 Share Posted November 30, 2007 I have a 1st generation 50mm AF 1.4 Nikkor, and I have always wondered what the grooved slot on the thin focus ring was all about. Anyone know? Link to comment Share on other sites More sharing options...
leicaglow Posted November 30, 2007 Share Posted November 30, 2007 I don't recall seeing a notch on the focusing ring. Is your lens like this one: http://www.bhphotovideo.com/images/largeimages/97413.jpg or are you talking about the aperture ring? Link to comment Share on other sites More sharing options...
Michael R Freeman Posted November 30, 2007 Share Posted November 30, 2007 Claude is asking about the 1st generation Nikon autofocus lenses, all of which had narrow, hard plastic (no rubber) focusing rings. And they all had a slot in the focusing ring. I haven't the foggiest idea why the slot is there. The lens barrels also have slots. Perhaps it was for assembly purposes?<div></div> Link to comment Share on other sites More sharing options...
ronald_moravec1 Posted November 30, 2007 Share Posted November 30, 2007 The dual long ones provide a grip for mounting. Does the slot line up with the dual slot when the lens is at infinity? maybe it is just an indicator so the AF would engage properly and say an F4 or so the photog could tell easily? Just guessing Link to comment Share on other sites More sharing options...
dan_brown4 Posted November 30, 2007 Share Posted November 30, 2007 Prolly there an an alignment index during automated manufacturing. Link to comment Share on other sites More sharing options...
claude_batmanghelidj Posted December 1, 2007 Author Share Posted December 1, 2007 Michael, thanks very much for the illustration! So, the mystery continues...... Link to comment Share on other sites More sharing options...
lex_jenkins Posted December 1, 2007 Share Posted December 1, 2007 I'm gonna take a wild guess... Some early Canon FD lenses, particularly from the breechlock era, had little protruding lugs designed to mate with a flash attachment to provide distance based flash exposure adjustments, similar to the guide number flash exposure adjustments available on cameras like some Canonets and the Olympus 35 RC. As the focus ring is adjusted the aperture automatically adjusts appropriately to suit the requirements for a manual flash (no auto thyristor). So, perhaps that little notch on the early Nikkor 50mm f/1.4s and f/1.8s Mark I series were intended for that purpose. But I don't know whether Nikon ever followed through on a use for that notch. Again, just a wild guess. Link to comment Share on other sites More sharing options...
alex_mey Posted April 24, 2013 Share Posted April 24, 2013 <p>Hey everyone, I purchased one of these lenses today, and I can't seem to find any info about them. How much were they new? How much should I have paid for this lens? How much is it worth? I know this has been a dead forum for 5 years, but I need your help!</p> Link to comment Share on other sites More sharing options...
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