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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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04-03-2008, 12:55 AM   #616
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Is this normal on DA* 16-50mm?

Is this normal on DA*16-50mm at 16mm f/2.8? Seems like the vignetting is pretty intense and the border sharpness is not to great.



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04-03-2008, 12:57 AM   #617
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And would this be a good copy?
04-03-2008, 01:24 AM   #618
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Joonee, maybe try going outside and shooting a brick wall, its hard to say by the shot you've provided.

"If everyone bought just one of sweaty balls..." lol... good screen capture.


Quick! hide! I hear the boys with the pitch-forks and torchs coming...
04-03-2008, 09:47 AM   #619
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I don't think a screen shot test well at the best of times. Take a photo of something else and see how it turns out. There will be some vignetting at 16mm @ 2.8 no matter what lens you have; it's a huge problem to eliminate it in lens design and manufacture when you get into super wide angles.

04-03-2008, 10:33 AM   #620
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Based on Tokina 16-50mm for Nikon, use it at a little longer FL. Let's say either at 19mm or 20 mm. It will drastically reduce the vignetting.



kyrios
04-04-2008, 07:02 AM   #621
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My DA*16-50 Test - defect or not?

Hello,
I found a problem when I did focus test with my new DA*16-50. It's clear that the right border is sharper than the left border especially at 50mm 2.8. Is it normal for DA*16-50? Is is a design defect or just a QC problem?
So what do you think, return or replace?

SN: 9011464
Made at: Dec, 2007

Thank you
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04-04-2008, 07:14 AM   #622
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I'll call that another dud with decentered lens elements.

It would only be appropriate if a Pentax representative would step up to the plate and explain what's going on with these lenses and how they intend to correct it.

Perhaps Ben with his close relationship to Pentax France could wrestle some information out of them?
04-04-2008, 12:47 PM   #623
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Pentax DA* 16-50

Hi to everybody,

i would like to know your opinion.

is it worth the money?

Some people says no other yes.

What do you thin about?

Davide
Italy

04-04-2008, 01:08 PM   #624
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im getting mine next month.
04-04-2008, 01:13 PM   #625
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My vote would go for the DA* 16-50, since my copy met my expectation.
04-04-2008, 01:28 PM   #626
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I've been pleased with mine. It's got better colour than my 14mm and at 16mm & 24mm, it resolved better than both my 14mm and 24mm primes, edge to edge. The only lens I have in that range that beat it was my 43mm.

The only draw-backs to this lens (my copy of it) is that it has a bit of zoom creep going from 16mm to 18mm, I can't use my singh-ray polarizers on it without vignetting at the wide end (Cokin size 'P') and while it's a very solid lens, it's not as solid as my old FA*24mm.

The advantages of this lens are that the SDM is very quiet, which I appreciate and it's weather-sealed (which I've tested quite thoroughly and been pleased with). Just for the weather-sealing, I consider this lens worth it.

My piece of advice is you go to the store and try the one you're thinking of buying out. There have been a lot of duds out there and it'll save you a lot of grief if you can confirm you've got a good one before you pay.
04-04-2008, 02:26 PM   #627
and
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its a great lens, its just that there are many lemons out there, if you get a good one then its great. i would think twice before ordering one online.
04-04-2008, 04:24 PM   #628
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QuoteOriginally posted by Ole Quote
I'll call that another dud with decentered lens elements.

It would only be appropriate if a Pentax representative would step up to the plate and explain what's going on with these lenses and how they intend to correct it.

Perhaps Ben with his close relationship to Pentax France could wrestle some information out of them?
thank you Ole.
04-04-2008, 04:33 PM   #629
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Your focus chart is not flat; which, may affect your test results. I thought my 16-50mm lens was bad; but, it turned out to be user error when I was performing the test.
04-04-2008, 04:34 PM   #630
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is that even a mildly flat surface?
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