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10-04-2009, 10:31 PM   #1
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Horrible IQ, is it my lens or camera?

So I took my K7 and DA* 16-50 out for the first time today since receiving them a few weeks back. When I got home to further look at my shots I noticed very bad image quality on all my shots. Here is an example. When viewed at 100% the image seems to be double. I have heard stories about bad copies of the 16-50 and I have heard about the shake reduction messing up shots. I had shake reduction on at all times. Any opinions would be welcome. Thanks!





10-04-2009, 10:32 PM   #2
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Sorry forgot the data 1/200 @ F/7.1 ISO 200 and 21mm
10-04-2009, 10:38 PM   #3
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Here is another example 1/100 @ F/9, 21mm ISO 200





10-04-2009, 10:50 PM   #4
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To me they look like very nice images, especially this one.

I think that you may just be expecting too much from your camera and lens.
While viewed at full size on a computer photographs will often take on an appearance like that, no mater what system or lens you use.

10-04-2009, 10:58 PM   #5
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I have had much better results previously when I was on the Nikon system using the sigma 150-500mm and a Nikon 24-85mm my images were much sharper at 100% crop.
10-04-2009, 10:59 PM   #6
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You had different results before you sent them in? Put it on a tripod and use a self timer.
10-04-2009, 10:59 PM   #7
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First thing I though was: focus might not have locked on correctly.
There have been times I noticed AF locking focus incorrectly at times. When I notice this, I just retry the AF and shoot.

At 100% you should not be seeing these abberations. Something tells me this is not the lens, though. Appears more like camera shake (AFAIK, SR does not engage unless needed - like when Tv exceeds 1/FL).

I'd say try your 16-50 again under more controlled conditions to see if this effect is replicated - tripod, good lighting and a detailed flat subject you can test sharpness throughout the frame.
10-04-2009, 11:10 PM   #8
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This is what I am comparing it to. This shots were taken in vary much a similar manner. ISO 200 @ F/7.1 24mm, but the shutter was 1/1000. This is from a less expensive Nikon lens.



And @ 100%



10-04-2009, 11:19 PM   #9
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Remember you can still have camera shake appearing in your images even if SR is on and the Tv is adequately fast. Holding the camera incorrectly or inherently shaking the camera body while taking the shot can produce such blur no matter what the shutter speed.

Try again using a tripod and see.
10-04-2009, 11:23 PM   #10
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hmmm..... my kit lens can get better results than that.

are you sure it's not user error?
10-04-2009, 11:27 PM   #11
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Here I pulled up a shot in which I did use my tripod, it was also from earlier today. 1/250 @ F/7.1 ISO200. I have noticed that this is a much clearer image. I just cannot believe how poor those other images turned out, even hand held I would expect more. At least my worries about it being the lens have diminished, now that I am comparing it to a tripod shot. I think I jumped too fast on the horrible picture bandwagon, without comparing them to the tripod shots... Good news that everything is supposed to be the way it should be, and it's just USER ignorance!!



10-04-2009, 11:28 PM   #12
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it looks like motion blur. were the conditions windy when you took those shots? your exif data show that you are using auto-exposure and your shutterspeed are at around 1/100 and 1/200. I suggest you boost up your shutterspeed. if not, there might be a problem with your SR system.
10-04-2009, 11:35 PM   #13
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QuoteOriginally posted by Crepusculum Quote
Here I pulled up a shot in which I did use my tripod, it was also from earlier today. 1/250 @ F/7.1 ISO200. I have noticed that this is a much clearer image. I just cannot believe how poor those other images turned out, even hand held I would expect more. At least my worries about it being the lens have diminished, now that I am comparing it to a tripod shot. I think I jumped too fast on the horrible picture bandwagon, without comparing them to the tripod shots... Good news that everything is supposed to be the way it should be, and it's just USER ignorance!!



whoops, looks like we just posted a few secs apart before you got the answer. anyway, I wouldn't suggest you shooting at around 1/100 or even 1/250 on a bright sunny and windy day. it's just too slow on those occasions where you are shooting foliage and moving water.
10-04-2009, 11:35 PM   #14
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If you want to take camera shake completely out of the equation, you must be sure the camera is on the tripod with SR off, a 2sec delay engaged for shutter release, and conditions aren't windy or shaky where you are. If windy, bump up the speed to freeze action - at least 1/250sec.
10-04-2009, 11:35 PM   #15
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Strange!!!

What I find strange is 1/100 and 1/200 shutter speeds under the bright sun. Which mode you are using? Because in Nikon shot at f/7.1 the shutter speed is at 1/1000 (as the sunlight is very strong in that shot).

Atindra
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