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Old Mar 9, 2010, 9:21 AM   #1
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Default Another Pentax Kx question -- AF

I am reviewing the camera online and will not have a chance to handle the camera prior to purchase. I have read several reviews that have mentioned some limitations, most which I can live with.

However, one point that came up in all reviews was that the Kx sometimes had problems with its AF system in that it failed to "grab" the subject.

For those of you who use the Kx and use the auto mode, how often does this issue arise? My old P & S that has died had these symptoms, and it was not pleasant - I like to hear click when I push buttons.

If this is a problem that only happens once in a blue moon, I will sacrifice for the affordability and for the size of the camera.

Thanks again for the help.
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Old Mar 9, 2010, 12:14 PM   #2
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bump up
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Old Mar 9, 2010, 12:45 PM   #3
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The only time the K-x fail to get a af lock on a subject is in really low light. Only my T1i could get that lock that low of a lighting environment in the entry level market.
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Old Mar 9, 2010, 1:29 PM   #4
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That tells me exactly what I need to know. Time to decide and get the credit card.
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Old Mar 9, 2010, 1:30 PM   #5
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Well, all the best with your purchase. Whatever you decide, I hope and am sure you will be happy. Also hope you upload some photos when you get a chance. Ned
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Old Mar 11, 2010, 12:42 AM   #6
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Quote:
Originally Posted by Luke Stepp View Post
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However, one point that came up in all reviews was that the Kx sometimes had problems with its AF system in that it failed to "grab" the subject....
There are two different interpretations to your statement. "failed to grab the subject" can be read as "the camera could not lock focus" or "the camera missed focus". If it's the former, it can happen to any camera (some more severe than others) under low light conditions. You just need to move the camera around a bit looking for some contrast line the camera can use to focus on. However, the latter is worrying as the camera really thinks the image is on focus, it locks focus and takes the picture. However, the result is an image totally out of focus. I don't know in which of the two the Kx falls into.
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Old Mar 11, 2010, 12:52 AM   #7
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I think it is the first that the reviews are referring to, as I have experience that situation with the K-x. But that was in a really dark indoor club. I have not seen any OOF issue with the K-x
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Old Mar 11, 2010, 12:55 AM   #8
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Tullio, I just read something of this just last evening... that it really is not just a Pentax AF, but other cameras strugging with a subject in low lighting. Interesting article. Anyway, I think sometimes people demand too much from AF in low-lighting situations... I just think it is alright to "manual", too... it is good to know one's camera, and how to shoot in low light. Thanks for your words above. Ned
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Old Mar 11, 2010, 1:06 AM   #9
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The problem with manual focus in low light is that if the light is to low, the human will not be able to get enough detail to see if the frame is in focus either. These are the conditions that the k-x has AF issues at. But in general most camera do have the same issues when place into this kind of low light conditions. So it is more dark condition then low light that most AF system have issues with.
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Old Mar 11, 2010, 1:54 AM   #10
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Quote:
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bump up
Please don't bump threads, not everyone will feel able to contribute and it is a pretty active forum so generally most threads are replied to.
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