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04-26-2008, 04:04 AM   #1
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Hello from NY/ !6-50 issues

Hello-
I bought a 16-50 in dec of 06 and ive never been happy with its focus. Ive read similar complaints here. At 50mm I can get a sharp image in manual focus but at 16mm its always soft unless Im at f/8 at a 250th or more. Even then its not blow up sharp. Im comparing it to the 50-135 2.8 which is razor sharp. I cant seem to find where the serial number is on the lens but does anyone here have any suggestions as to what i should do? Is Pentax recalling defected lenses? I love the range but im wary of using it now. Here are a couple recent images. the backlight in the wide is not a factor to the focusing. both pictures were focused manually. This lens is just so hard to focus.
Thanks-
Tim

pentax 16-50mm 2.8 test


Last edited by BK20D; 04-26-2008 at 04:10 AM.
04-27-2008, 07:15 PM   #2
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Hi BK20D welome to the forum. Unfortunatley there have been a few issues with that lens. although those that have a good one are impressed.

I would suggest at this point the return policy has expired. Send in into Pentax for repair. I see you have the K20D there is the ability to set up a custom profile for focusing - might play with that. Good luck and looking forward to some pics !
04-28-2008, 10:03 AM   #3
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QuoteOriginally posted by BK20D Quote
Hello-
I bought a 16-50 in dec of 06 and ive never been happy with its focus. Ive read similar complaints here. At 50mm I can get a sharp image in manual focus but at 16mm its always soft unless Im at f/8 at a 250th or more. Even then its not blow up sharp. Im comparing it to the 50-135 2.8 which is razor sharp. I cant seem to find where the serial number is on the lens but does anyone here have any suggestions as to what i should do? Is Pentax recalling defected lenses? I love the range but im wary of using it now. Here are a couple recent images. the backlight in the wide is not a factor to the focusing. both pictures were focused manually. This lens is just so hard to focus.
Thanks-
Tim

pentax 16-50mm 2.8 test
As far as I know, this lens only became available summer 2007.
It was introduced February 21, 2007.
See SLRGear.com
Are you sure it is the DA* 16-50mm / f 2.8?

- Bert
04-28-2008, 05:46 PM   #4
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Da*16-50

Im on my 3rd 16-50, !st lens after a while would not zoom down to 16mm, 2nd lens had intermittent focusing issues which started out hardley ever then would hardley ever work also on both sdm motors were slightly noisey. 3rd lens which by the way has the latest seriel number works very well focus is razor sharp and you can barely here it focus. much quieter than the previous 2. almost as sharp as the DA*50-135 but not quite in my opinion but there not far off. and that may be because of the different focal lenth. either way i love these 2 lenses. they get the most use in my case.....



Rick

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