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Old Sep 3, 2010, 11:03 AM   #1
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Default Strange spots on images, pentax k-x

I have had my pentax k-x for 2 weeks now and I have noticed that on some images that are taken outside in the sun these strange spots show up in the same spot, three dark spots. Does anyone know what is causing this?


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Old Sep 3, 2010, 11:51 AM   #2
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Yes, They are dust spots on the image sensor. Sometimes you can get rid of them by using the cameras dust removal system. I'm not familiar with the K-X but I believe it has the same as K10 K20's you have to go into the menu to turn it on. when you do the camera will vibrate for a few seconds when you turn it on. If that doesn't work, follow the manual's instructions on how to clean the sensor with a blower. normally that will do it, if not then you need to clean it manually with a sensor cleaning kit. That can be touchy depending on your skills so, if you need to go that far, be sure you know what you're doing first. good luck!
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Old Sep 3, 2010, 11:52 AM   #3
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OH, BTW, welcome to the forum!
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Old Sep 3, 2010, 5:23 PM   #4
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Yes there is a cleaning option, and sensor mapping also.

But if the internal cleaning down not help get a rocket blower, no compress air. Lock the mirror back. aim the lens mount down, and give it couple of squeeze with the blower. And that should take care of it. It is is still there. I may be an oil spots. If they are, bring it back to where you got it.
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Old Sep 4, 2010, 8:33 AM   #5
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OK please excuse my ignorance but how might one get oil spots on their sensor? I am not questioning the possibility I just dont know how it could happen.
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Old Sep 4, 2010, 1:43 PM   #6
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oil from the shutter or the mirror box would be where the oil could come from.
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Old Sep 4, 2010, 7:14 PM   #7
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Quote:
Originally Posted by shoturtle View Post
oil from the shutter or the mirror box would be where the oil could come from.
Well... for starters, a spray can of WD40 would do it!
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Old Nov 6, 2010, 1:04 PM   #8
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Default Same Problem

I just got the Pentax K-x yesterday. All the pictures have the same two dots. I did the camera's dust removal system and changed lenses, but still have the problem.

You can see here: http://gallery.me.com/dodsonfam#100261

Did you get your problem fixed?
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Old Nov 6, 2010, 2:49 PM   #9
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It's not the lens it's the sensor that has a bit of dust on it. The dust removal system in any dslr is not always a real help. (to put it mildly)

I normally clean my sensor with a artic butterfly (http://visibledust.com/). For me that works the easiest and best. Only had a specialist clean it once in the last 5 years to see if it would be better but that was 25€ for nothing.

Some extra info can be found at http://www.cleaningdigitalcameras.com/

Oh yes, welcome to the forum

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Old Nov 6, 2010, 5:37 PM   #10
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Hi nadz and ctdkite,

Welcome to the forum!

One thing not mentioned, the Kx also has "Dust Alert", a feature that was first included in the K20. You have to have an AF lens mounted. Take the lens cap off and point at either a cloudless sky or a blank wall -- whatever you point at needs to be featureless. Activate "Dust Alert" from the Set-up Menu and it'll prompt you to press the shutter. Hold until the exposure completes, but you don't have to hold steadily. After some processing time, the rear LCD will light up and you'll have a reversed image that shows you exactly where the dust is on the sensor, just as you would see it looking through the lens mount opening.

As has been mentioned a Giottos Rocket Blower is the best for blowing dust of the sensor. Another tip to remember is to squeeze the blower a few times before using it to make sure it's clear before using it in the camera.

Scott
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