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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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03-06-2008, 07:12 PM   #481
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QuoteOriginally posted by selar Quote
Yes, I used Shake reduction. Hand held. Do you think thats camera shake?

With the test you suggested - I don't understand this bit:



I also don't have a 200 or 300 f2.8, best I can come up with is F*300 at f4.5. I also would like to mount on tripod and use remote release with mirror lock up for the test.
What I am suggesting is that you stand exactly where you stood to take the photo and using a telephoto zoom, zoom in so 100% of the frame is the same as your cropped section. I think you would need about 300 mm to do so, they look at the photo ans see how clear it is viewed at the same image size. this will illustrate the camera shake impact.

Also, youo have teh curbe in front of you and a car across the street

At F2.8 a 16mm lens does not have this depth of field, so you should not expect the near curb tobe in focus, it simply is not possible.

Also I am not sure what exactly the camera focused on, and it may have been the garage door, not the car.

I don't mean to offend you but you need to get a good book on photography adn read about the limits of lenses. This will be invaluable to your understanding of your ptoblems

03-06-2008, 07:25 PM   #482
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Stop all this 50-135 talk; you're destroying me!

I want to get one so bad, but I just bought a Lensbaby. I haven't even done a thorough test with it yet.

Maybe I'll get a 50-135 towards the summer.

Good luck with your new glass, Buddha!

Mike
03-06-2008, 07:46 PM   #483
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When blown up to 100% shouldn't objects exactly on the plane of focus remain sharp? In that shot either no object is on the focus plane or the lens lacks resolution for a 10mp sensor at 2.8 and possibly upto 5.6. The distance scale on the lens was just past infinity. Does that mean I have the focusing past infinity problem?
03-07-2008, 04:03 AM   #484
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I repeated the same shot in the evening, but this time on a sturdy tripod, SR off, 3 secs remote

DA*16-50 vs DA18-55 aka kit lens both at 18mm f3.5

DA* Centre 100% crop


Kit Lens Centre 100% crop


DA* Top left corner


Kit Lens top corner


Verdict: I must have a really good copy of the kit lens!

03-07-2008, 05:07 AM   #485
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well selar, i am as you ,very curous what more experienced pixel-peepers make of this, since my 16-50 performs the same in comparison to my kit lens as yours does. Still don't feel happy with my 16-50. I am happy with my 50-135 though, but i realize i need the 16-50 more then i do the medium tele.
03-07-2008, 05:46 AM   #486
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OK Now we are getting somewhere.

couple of points and questions.

tripod helped as plate is now clearer,

BUT i agree that there is purple fringing at the base of the tree, and specifically less contrast.

Out of curiosity whay have you done with respect to filters and lens hood?
03-07-2008, 07:25 AM   #487
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What is the serial number on your DA*?
03-07-2008, 09:28 AM   #488
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DA* 16-50mm kaput.

So, I like many here have been following the threads relating problems with the 16-50mm DA* lens. I picked mine up Jan. 1 and have been happily using it since then... until this morning. I was taking a few photos, when the lens seemingly /jammed/ -- it's no longer able to go further wide than about 32mm. While I appreciate the versatility of 32-50mm, I think I'd prefer 16mm...

The lens (serial 9012XXX) is off to Pentax for repair or replacement

Pretty disappointing.

03-07-2008, 10:03 AM   #489
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wow that sucks I just got one yesterday and im just praying it doesnt go "kaput" on me any time soon.
03-07-2008, 03:04 PM   #490
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QuoteOriginally posted by Lowell Goudge Quote
OK Now we are getting somewhere.

couple of points and questions.

tripod helped as plate is now clearer,

BUT i agree that there is purple fringing at the base of the tree, and specifically less contrast.

Out of curiosity whay have you done with respect to filters and lens hood?
No filters on either lens. Both lens were fitted with their respective supplied lens hoods.
03-07-2008, 03:06 PM   #491
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QuoteOriginally posted by Buddha Jones Quote
What is the serial number on your DA*?
9013560

The car is definitely less sharp in the DA* capture.
03-07-2008, 03:32 PM   #492
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when i bought the K10d they only had the kit so I got that and also the *16-50. I went home and did the equivalent experiment, although with more closeup shots that are representative to what I normally would shoot. I found the same thing - the kit lens was sharper and better behaved than the * lens. So either I got a crappy * (which I returned) or the kit lens is stellar. I think it is more the former than the latter.
03-07-2008, 03:35 PM   #493
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I have looked again, and am not sure what to ask next.

Is it possible to get a mor normally lit shot.

1/3 or 0.3 seconds wide open is a little extreme.

how about a normal shot at 1/100 and ISO 100, in daylight

More like the first shot but on tripod?
03-07-2008, 03:57 PM   #494
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Yeah, that kit lens is a keeper. We never did start that lens serial number DB, Im gonna do that now.
03-07-2008, 08:07 PM   #495
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QuoteOriginally posted by Buddha Jones Quote
Yeah, that kit lens is a keeper.
You think so? That makes me feel happier about shooting the Meekong Delta and Cambodia with the kit lenses. Its a SA18-55, I'm very happy with my SA50-200 as well, got some good shots in Kakadu with it.

Last edited by Buddha Jones; 03-07-2008 at 10:01 PM.
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