Does dust specks inside lens cause blur in the pictures?
Hi; I'm getting a little whitish blur in my pictures. Same place every time. When I look at the lens (plastic cover, looking inside at aperture of lens) I see a couple largish specks of dust adhering to the inside of the lens. Is this the problem? Anyway I can 'blow it out' using canned air? Or can a local camera repair place (Canon dealer) take care of this? (If that's what's causing the blur in your opinion). thanks, John
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Re: does dust specks inside lens cause blur in the...
If you have a SLR camera you can take your lense off and clean it.. I do not reccoment canned air because if you do not use it the right way liquid will come out. At best buy they have cleaning kits, and in their kit they have a little brush that you can squeeze regular air and brush off anything on the lense or around the lense, If you have a SLR camera you might have a built in cleaning option... SLR means Single Lense Reflex and this means your lense can come off/interchangable..
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It is difficult to say what is wrong, without having the camera in my hands, but perhaps I can describe what went wrong, when you look very close to or better into the lens.
On the glass or plastic parts of the lens elements in a lens, sometimes a mould can grow. For that there must be some moisture inside. When your camera is old, it is possible you once had it outside when it started to rain, or it was in a cold place for a longer time, so some damp could settle inside. If mould is settled on one (ore more) lens element(s) the damage is done. The interchangeable lenses from DSLR cameras can be worth bringing to a repair shop, but the system cameras and point and shoots, special when they are aged, are not worth repairing. Cameras are getting better and better, and in the same time the prices are going down, almost in the same pace.
I don't know how bad the blur is. But if you don't see a thing on the pictures you take, leave it and always put your camera at rest on a clean and dry place. If not the lens, but the pictures are blurred, perhaps something else is going on?
Question is, Is your lens blurred,or are all your pictures blurred? If you can see the front of the lens is really dirty, you could try to clean it with a lens pen. One side has a soft brush to remove the dust and perhaps other debris. Please try to remove debris with a little presuerd air. If only smear is left on the lens, you than can use the other end of a lens pen. It has a very soct pad, with wich you than can remeove smear. If the lens looks ok, please don't touch it. Perhaps you don't take enough time to let the camera focus on the subject. When making a picture, press the shutter release button half, till he AE/AF indicater flashes and you hear a beep, then you can press down and make the picture. If you are making pictures without a steady hand, pictures also can come out blurred. Special when there is little light avalible. Then choise a higher ISO. I hope this helps. You still can fine the manual online.
The spots can be in the inside of the lens settings to the CCD/imager.
If the cleaning of the lens is done well it can be a speck of dust logged in to the screen and having it on the image.
A careful cleaning in a dust proof set up is required.
I'm having a similar problem with my G2. It happened after I took somephotos when it was snowing. I think some moisture may have got on thesensor and left stuff on it. I don't think it is the lens that iscausing it, as this can never leave this kind of smudge. I stillhaven't got round to doing anything about it.. I would be interested tohear how you got on with getting it repaired.
I found this article which confirms what you were saying about thehigher f-stops (and also provides and explanation). I have also checkedthe EXIF data on my photos and found that there is a correlation withhigher f-stops and degree of blur (with very little to no blur at thelower f-stop values).
It is probably a speck of dust on the sensor. Get a blower from any camera shop, remove the lens,lock up the mirror (mirror lock up in camera menu) and give the sensor a good blow ( without touching it) while holding the camera front down so that any specks of dust fall away from the sensor. Sometimes specks can stick (pollen for example) in which case you could try a disposable swab and cleaning solution, although if unsure most camera shops provide the service pretty cheap - the sensor would be a lot more expensive to replace if you mess it up.
My Nikon was having the same problem with the stationary black spot. I used a can of Dust Off ( the original compressed gas duster). I just removed the lens and held the camera upside down (lens facing the floor) and blew my compressed air inside and my black spot disappeared. Just a thought you might like to know !! Good luck.
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.