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Re: Dust inside my d200
The view finder and focusing screen are separate from the CCD sensor. The mirror reflects the image to the view finder until you take a picture. Then the mirror goes up, the shutter opens to expose the CCD to capture the image.
If you have a lot of dust, you should look into a cleaning kit, or have it professionally cleaned. This will show up on your images as white and/or black specks.
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Whoops! Clicked the wrong icon before. Here's my solution:
The spot is most likely a spec of dust that is on or in the cameras'
lens or optical sensor (the sensor is the "film" in digital cameras).
Dust is a problem for the SLR type cameras (the kind that have removable
lenses) as the camera body is open when swapping lenses. Your camera
does not have the ability to accept different lenses - so the chances of
dust is minimized - but not impossible. When zooming, the lens extends
and creates suction inside. When air is drawn in, a particle of dust
was could have been brought in at the same time. Most of the time,
dust will vary in appearance from a sharp, irregular shaped object to a
fuzzy, rounder object - depending on whether the lens is zoomed in or
zoomed out. A professional cleaning should be able clear this problem.
Contact a camera shop for an estimate.
Other times, this is a
much more sinister issue. The optical sensor has developed a problem.
The optical sensor or simply "sensor", is a small rectangular
semi-conductor that is sensitive to light. The size is often stated in
"pixels". The are about 10 million pixels on a 10 megapixel camera's
sensor. One of the sensor's has stopped responding to light focused on
it by the lens. Depending on how it failed, this will appear either as
a sharp, black dot in the same place of every picture if is failed
"off" (this is called a dead pixel), or as a sharp colored dot in the
same place of every picture if it failed "on" (this is called a hot
pixel). Unfortunately, dead and hot pixels can not be fixed
individually. The entire sensor must be replaced as a unit. This can
be a costly repair depending on the camera make and model and sometimes
it is better to buy new instead of investing money in an older camera.
Again, consulting with a camera shop that does repairs or even the
manufacturer in this case is in order for the best estimate of what
repairs may cost. Good luck!
Take a couple of pictures, over a dark background, if you can see the spec of dust on them, the problem might be in the mirror. Now, if the dust does not appear on the pictures, it's either on the viewfinder, or somewhere else out of the way of the sensor.
You should never try to clean the sensor by hand, always ask a profesional to do that for you.
You must have dusty mirror box area. Here is what you should do. 1. Remove lens from the body. 2. Blow out any dust from the mirror box area using can duster (careful not to spew out liquid). 3. go to menu and select mirror up or ccd clean mode. You can also set at manual shutter speed "B" and hold up the mirror. 4. Blow out dusts over the CCD sensor (Do Not Use can air! If any liquid sprayed on CCD the cleaning gets worse) so use Hand-squeezee air bulb. You can purchase one from any camera stores.) 5. test shots and repeat. 6. If this procedure did not resolve the removal of the dust, you can purchase a cleaning solution package and try it. I do not recommend it becasue our techs get lots of cleaning requests from these package. Remember, if you are using these solution, 1. Never give any pressure to the screen, just tissuie touch pressure only. 2. move circular motion as you mouth blow the air as you move. complete the motion exiting through the corner of the screen. Did not work? send it to repair techinician! Our tech cleans it for $49. 24 hour turn around and also checks the camera too. Good Luck
If the specks are just on your viewfinder focussing screen, they won't be on your pics. If they're on both your pics and focussing screen, you need to find someone else to clean your camera. Cleaning either your CCD sensor or your screen yourself can leave scratches. Changing lenses often can suck dust into the inside if the body is dusty. Try another repair shop for thorough cleaning - it shouldn't cost more than $50.
That's odd. I had the 707 (may she rest in God's eternal peace), and never thought that dust could get behind the lens.
Do you see the dust when you look through the EVF, or when you look at the lens itself? Either way, one way to test it is to set the camera to the smallest aperture (f/8), infinity focus, and shoot a clear blue sky. Open the picture in your editor program, and see if the dust shows up.
That's a technique to use with an SLR to see if the dust inside would affect a picture, so I'm not sure if this will work with the 707.
I had hoped that a few people would check their cameras and posted replies before I contacted Pentax about my dust problem, but nobody has so far. But it's interesting that someone else posted a message this morning that he has some dust inside the lens of his 550.
Anyway, this morning Pentax Canada told me that there should definitely be NO dust inside the viewfinder or the rest of the camera for that matter. Although the Viewfinder is "almost sealed" from the rest of the camera, it is not a total seal - which means to me that if dust can get into the viewfinder, it can get into the rest of the camera's interior - including the lens and imaging chip. They have asked me to bring my camera in so they can remove any dust particles that are inside.
Basically, they told me that the only place I should see any dust is inside the lens cover, which is meant only as a protective covering rather than a seal from dust. Even then, they claim that any dust on the outer lens would only enter while the camera is being used. That one I don't buy, as the lens cover is very flimsy and can easily be accidentally spread open while the camera is turned off.