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06-17-2012, 04:02 PM   #1
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FA 50mm f1.4 Stopped focusing to infinity HELP!

I was shooting a recital this weekend inconspicously from my seat and midway through it just stopped! I did not have a back up lens (bummer, but made up for it today). Has this ever happened to anyone else? The lens mounted to my k5 was not jostled or dropped, it doesnt make weird noises, it just stopped! I can focus to a maximum of 30 feet in front of the lens (approx)... any help is greatly appreciated!

06-17-2012, 04:20 PM   #2
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Are you saying the ring actually won't go to infinity or when it gets there it is not really infinity?
06-17-2012, 07:12 PM   #3
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The ring goes to infinity, but does not actually focus to it
06-17-2012, 07:56 PM   #4
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QuoteOriginally posted by The Kurly One Quote
The ring goes to infinity, but does not actually focus to it
Are you saying that when attempting to manual focus, the focus ring has full travel, but the lens stops short of moving to its minimum extension (infinity focus point)?


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06-17-2012, 08:36 PM   #5
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Yes, it says its at infinity but does not actually focus to infinity
06-17-2012, 09:01 PM   #6
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QuoteOriginally posted by The Kurly One Quote
Yes, it says its at infinity but does not actually focus to infinity
I would say you have an internal mechanical problem with the lens.

It may be repairable. I would suggest a competent technician.


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06-17-2012, 09:11 PM   #7
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Can someone name a better 50mm replacement lens? Just in case I opt to purchase a new one?
06-20-2012, 06:58 AM   #8
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Da *55

06-23-2012, 05:46 PM   #9
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To answer The Kurly One, the Sigma EX 50 f/1.4 is well regarded, and the price has been coming down a bit lately. It's a big lens, though. So if you're looking for a small lens like the FA 50, this isn't it.

That said, I just got myself a used copy of the FA 50 f/1.4 and I love it. Well, I loved it until I tried to do a landscape. It's not focusing to infinity. When the lens thinks it's at infinity, it's only at about 25-30 feet. I can hear the motor trying to turn it further, but it's a hard stop. So disappointing, especially since I think I got a great copy otherwise. It's even sharp wide open. And the autofocus is fast - faster than either my F 50 f/1.7 or FA 50 f/1.7.

Has anyone out there ever fixed this problem themselves? I know, I could probably send it to Eric Hendrickson (have to ask him) or whatsit called - the Pentax repair place. But I'd have to send it away, and I'm leaving for vacation in about 10 days. I also don't want to add the service price to the cost of the lens. I admit, about 90% of my use of this lens will be within the 25-foot range. But infinity focus sure is nice to have.

I know you have to take off the front retaining ring and the filter ring (3 screws), but is there anything else to look out for? I'll probably end up sending it out. I'm just asking.
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