I have a problem. when I look at my lens from the front, I can see a bunch of dust specs have settled on the second element. I've tried blowing around the lens housing with canned air, but nothing moves. Big mystery. How'd it get in there? Anyway, I'd like to remove the first piece of glass. I have the parts diagram, but it isn't clear on how to remove the glass. Has anyone out there been down this road? Any help would be greatly appreciated!
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Re: Help.Dust under first lens layer.
Same here. dust usually doesnt show up on photos as it is out of the focal plane. Many SLR lenses have dust in them and do NOT affect picture quality. I am in the process of attempting to take one apart. I have seen a damaged one that was seperated at the first 2 joints but it was glued back. this is one tough nut! http://picasaweb.google.com/pishta68/8080lens/photo#5199141246863292738
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Once you start blowing air from aircan (duster) it will move the dust sitting on the barrels' surfaces of the lens. The dust specs will end up on the interior of the lens glass even in larger quantities. The only way to clean it correctly is to take apart the lens and blow the dust out and assemble it back. If the same camera is listed on ebay under $50 buy another one with a clean lens. Sell yours on ebay for parts the difference will be around 15-20 dollars. Not a bad price for getting a cleaner version of your camera. You may even make money by buying a better camera cheaper than you can sell yours. If you camera is still valued at 100-200 range find a cleaning service on ebay for $30.
If the spot is in all foto's and in a video, it is most likely not the lens. Could be a dead pixel (some pixels). But almost certain a spec of dust or othes debris that entered the camera. Because this camera came with a fixed zoom lens, there is no sensor cleaning option. And I can't find a posibility to make a dust retentie picture. To check if the spot is on the sensor, put the camera in manual, set aperatur to the greatest figure (smallest opening) an make a picture of a white object. If you see the spot, you were spot on. When the camera is new, this could be a reason, to go to your dealer and ask a new camera. Take the dust retentie picture with you.
The camera is not coming on because movement of the lens is restrcted. The problem could be that some dust is stuck in the lens well between the lens housing and the well wall. Please use your hairdryer to blow the specs of dust and free the lens movement. Once the dust is dislodged, the lens will move freely and the camera will bootup.
It seems that there is some spec of dust thats lodged between the lens housing and the camera body. If you use your vacuum cleaner to pull the dust out while trying to shut it down, the dust may come out and the lens housing will start moving thus completing the process of shut down.
It may not be the view finder. My guess is that there's some dust on the lens. It will look like the dust is inside the view finder but its actually not. Do these "spec" appear on pictures too? If yes then you will need to clean your lens/get it cleaned.
The movement of the lens is motor driven. When you turn the camera on,
the lens moves. The error 12, error 14, and error 22 refer to control
stages in the lens movement ( I think error 22 means the lens won't
retract). The lens housing and gear mechanism in this camera is
plastic. If there is dust, sand, or debris around the lens housing, it
may bind the lens when it trys to extend or retract. By banging it, you
might work the gears loose or dislodge whatever is binding the lens
(same with the "canned air" blowing out the dust). We've purchased a
bunch of these cameras for our electricians in the field. Several have
come back with this problem. I've taken the case off, and torn the lens
assembly apart, only to find the plastic gears have been "buggered up".
It's an inexpensive camera. Try to clean around the lens, give it a few
slaps, push/pull the lens.... but failing this fix, buy a new one.
To access the inner optics on these compact digital cameras the lens must be disassembled from the inside out. Usually the camera casing has to be removed, boards and connections moved out of the way, and the lens assembly actually removed from the camera. At that point the lens can be taken apart and the inner optics accessed.
In other words, yes, this is a job for a professional. It is also probably not worth the cost just for a couple specs of dust.
These lenses are not sealed. This is why the dust gets in there to start with. If you get a can of compressed air and carefully blow into the gaps between the lens parts in different directions somtimes you can get enough air through to blow off the inner lenses. This does not often work though.
Advance Camera Repair
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.