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View Poll Results: Is this DA*16-50mm good or bad?
Keep it -- it's good. 2388.46%
Return it or send it in for repair. 311.54%
Voters: 26. You may not vote on this poll

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12-29-2008, 03:54 PM   #1081
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Yeah, I've removed and reinstalled the lens a bunch of times, and nothing seems to change. I've also noticed that I can't do quick touch-ups when in AF mode. Also, when turning the ring in MF mode, the dof scale doesn't move at all.

12-30-2008, 02:52 PM   #1082
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Had this when testing a brand new DA* 300 in SRS, it was faulty out of the box, so maybe it's a faulty unit?
12-30-2008, 03:44 PM   #1083
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It sounds like it's faulty to me, the focusing ring on mine always works regardless of the lens being in AF or MF mode. I'd send it back to the shop for replacement as an out-of-box failure.
01-02-2009, 09:49 AM   #1084
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Yeah, I haven't found any answers for it, so it must be a bad unit. I've sent it back to the seller, and they'll be sending me a new one.

01-02-2009, 09:55 AM   #1085
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Sorry to hear about your problem. This is a little disturbing. Iím seriously considering the DA* 16-50 but I keep hearing stories like this one which give me pause. One has to lay out some pretty serious coin for this lens. That being said those who have a good copy seem to love it and produce great images. If I go this route Iíll buy it from a camera store and make sure it works before I leave.


Tom G
01-02-2009, 10:31 AM   #1086
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Hi Stooley,
The first indicator when you switch the lens to MF is MF is displayed on your LCD and viewfinder. Well, it's on k200d but I think k20d is the same.
Try to clean contacts. Do you have other lenses to try to exclude the camera?
Good luck.
01-03-2009, 03:24 PM   #1087
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The MF indicator would come on in the viewfinder of the K20D, and the contacts looked pristine. I am just assuming I got a faulty lens.
01-06-2009, 10:24 PM   #1088
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Question for 16-50mm owners

I have not used mine for a month and really do not remember this noise. When I auto focus, I can hear a high-pitch beep-like sound for a moment when it starts and stops focusing. Neither my 50-135 or DA*300 do this. They only make the normal quiet motor noise that a SDM type motor makes.

A second thing... I have not used either zoom for a month and neither would AF at all for a minute at first. I had to remove them from the bodies and place them back on. The 50-135 works perfect now, but the 16-50 makes that beep-like noise. Any ideas?

01-07-2009, 12:32 PM   #1089
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anyone have a moment to test their AF for a beep-like noise?
01-07-2009, 02:10 PM   #1090
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I used mine earlier today, and I only remember the noise when it was focused on the object...
01-07-2009, 02:11 PM   #1091
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You can turn that sound off in the menu.
01-07-2009, 02:56 PM   #1092
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QuoteOriginally posted by roentarre Quote
You can turn that sound off in the menu.
It's not the body beep, it's a beep-like sound coming only from the 16-50 lens.
01-07-2009, 03:09 PM   #1093
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Clean the contacts on the lens and on the body with a bit of alcohol on a micro fibre cloth. My 50-135 has done this to me at times. I can postpone the problem for a month or so by cleaning contancts. It never happens with my 12-24, rarely with the 16-50, but often with the 50-135. I suspect the contacts for the SDM (the old power zoom contacts) are the ones with the trouble. Removing and reinstalling probably wipes off whatever was in there.
01-08-2009, 02:32 AM   #1094
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I second what Albert says, clean the contacts. If it still persists, you might want to take that to the shop to have it checked. My 16-50 was dead silent (thought it wasn't working when I first got it).
01-08-2009, 04:07 AM   #1095
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The 16-50 makes a high pitched whine. You need to be young to hear it as it is very high pitched (I'm 16, i hear it if i concentrate). It is a possibility that resistance or fatigue in the motor means that when it is starting and stopping the speed of oscillation is decreasing to within the hearing range.

Either way it is nothing to worry about, the motor relies on high pitched oscillations and as long as it is still functioning it should be ok.

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