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12-03-2008, 06:56 PM   #1
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SMC Pentax-FA 50mm Macro problem

Hey guys, lucky for me I stumbled into a steal for a 50mm FA Macro. It's in superb (read: practically mint) condition, but it seems like the limiter switch is not having any effect on the focus travel, seeming like it is stuck in the "on" position. The lens has extremely limited focus travel, starting at about 5 ft, which i assume is where the limiter starts when it's on. Has anyone else had this problem? Am I doing sometihng wrong with the limiter to turn it off? All i'm trying to do is rotate the switch to the off position, but maybe there is a magic touch i don't know about?

Any help/insight would be great!! Thanks! -Jim

12-03-2008, 10:13 PM   #2
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The FA50 macro has no limiter. The knob controls the friction on the focus ring so that it can be tightened for MF.
12-03-2008, 10:27 PM   #3
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Ah, so the designation of "Clamp" just means that it applies friction so manual focusing is smoother?

Either way, it seems to get stuck at 2ft and I'm not sure why.

Last edited by arpaagent; 12-03-2008 at 10:33 PM.
12-04-2008, 12:24 AM   #4
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Problem Solved!!! It turned out that I just needed to turn it harder than I was trying. I'm guessing this lens was purchased years ago and never used, maybe some grease hardened up. After a few twists to get it through a couple tought spots, it works great!! I was worried for a minute, but now i'm happy as can be!! Can't wait to take it out for a test drive.

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