Question about Canon Rebel XT / EOS 350D Digital Camera

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Cleaning interior viewfinder lens?

When I look through the viewfinder I see a lot of dust spots in the frame. (Fortunately the photos are coming out fine, so I think the mirror is be in good shape.) I assume the problem is that I have junk on the viewfinder lens that sits in the body above the mirror.

How do I clean this safely? I've tried brushing lightly with a soft lens brush, but that hasn't helped much.

Thanks for any advice!

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Re: Cleaning interior viewfinder lens?

Try to use an air spray for dust. get the lens off and clean above the miror. with the air spray the dust will disapear. dont use air pumps becose u mes it up. and dont use compreset air from regular compresor, u will get oil on your lenses.

Posted on Nov 20, 2007

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I have a Canon EOS 60D. Some balls/spots are appearing in the pictures. First time I thought it may be for the lens, then I changed the lens but the spots exist. It seems to be cleaned somewhere inside the...

Most of the time you see "spots" on your pictures, they are induced by dust on the sensor. Nothing to panic about, it happens in all camera's where you can switch lenses, like in your 60D.
To make sure what I tell, you can make a dust retention picture.
Pot your camera in manual, or Aperture priority. Put the lens (any lens you own) to highest aperture number (22 or higher). Switch to manual focus and turn it to infinity. Then make a picture, from a with sheet of parer, with lots of light.
The picture that you made, can be viewed on your computer. To start zoom in, to the place you last saw "spots" I think you can see blurry spots around there.

To get these spots away, you could go to a service centre, but you also could try to remove them yourself. In your manual, you will find how you can put the mirror up and how to opener the camera shutter for cleaning. With a special brush and a bellow, toy can remove most of the dust on your sensor. Sometimes debris will not come lose when you try, then you could try a "wet" cleaning.

Don't use brushes you have at home. Use special tools made for camera's. That also goes for the wet cleaning. Everything in the camera is very delicate, so handle it with care.
If you don't trust yourself, goto a service centre. But be aware dirt on the sensor will happen more then once. If you are young, learn it yourself.

Mar 06, 2014 | Canon Digital Cameras

1 Answer

Samsung es30

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.

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Have you change lens sense this problem. Could be a glitch in the software of the camera.

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If you have another lens, switch it and take some shots of the sky. If the spot is gone, it probably was the lens that needs cleaning/servicing. However, it's more likely that there's dirt on your CCD. On your camera's menu, select mirror lockup/clean CCD (I can't remember the exact terminology but you get the idea).

After you select that, the mirror will stay up. Remove the lens and you'll see that the CCD is now exposed. Use a blower (don't use your mouth to blow as you will end up with spit in the camera) to clear out any dust/debris on the CCD. Don't touch the CCD.

Turn off the camera and you'll hear the mirror go back down. Re-attach your lens and try some shots.

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1 Answer

Grainy, Spot Filled Images when using Manual Modes Only

It sounds like the aperture is getting set very high. If the aperture is a high number, the lens opening is very small which lets less light in and would cause a dark image. This would also show any dust that is in or on the lens or image sensor. The dust doesn't usually show on apertures with a larger opening (smaller number). Make sure your aperture is being set to a reasonable number, probably no higher than 8 or so.

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1 Answer

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Ok, step one - find an appropriate cleaning solution - be it an air blower, like a rocket blower, a pads, alcohol and a qtip, etc. Keep in mind that it's not necessarily true more expensive means better cleaning... but I wouldn't go the dirt cheap route of alcohol and a qtip, though many claim they use it. Personally, I use a blower, but I havn't had anything more than dust thus far...

After that, prep a very clean environment, then take off your lens, and clean your mirror!!! Then when you think it's clean, try your camera again... if you still have spots, then you're going to have to clean the sensor... again, I'd use a blower, especially considering that if you ruin the sensor, you've pretty much ruined your entire camera.

If you STILL have spots, check your lens for dust, both front and back lenses. Still spots? Try another lense entirely (might be scratches). STILL on there? Then you probably have a bad sensor... see warranty information and pray :).

If any of this makes you queasy, look in your phonebook for stores that will offer repair, and try to locate the Nikon-qualified if possible.

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If you are getting spots regardless of which lens you use, then the stops are coming from debris on the CCD imager in the camera. There are cleaning kits available on the internet and in retail photo stores

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2 Answers

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Dust on the CMOS sensor.

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550 Problem: Dust collecting inside Viewfinder

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.

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