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#1
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Cleaning the Mirror, etc.
inki wrote:
Now, when looking through the viewfinder, one can be distracted by some dried stains that indicate where splashes of fluid hit the mirror. Is there an easy way to wash the inner parts of an slr camera body, if the problem is more than just dust? I have used 99% isopropyl alcohol and Q-tips to clean SLR mirrors without obvious problems. Be sure to change Q-tips often and be very gentle. You may need quite a bit of patience. I have heard of people harming mirrors this way, but I've had no problem. Work very slowly and stop if you are doing harm to the mirror surface. You may want to think about having the cleaning done by a camera repairman. Peter. -- |
#2
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Cleaning the Mirror, etc.
On Fri, 1 May 2009 20:14:03 +0000 (UTC), Peter Irwin
wrote: inki wrote: Now, when looking through the viewfinder, one can be distracted by some dried stains that indicate where splashes of fluid hit the mirror. Is there an easy way to wash the inner parts of an slr camera body, if the problem is more than just dust? I have used 99% isopropyl alcohol and Q-tips to clean SLR mirrors without obvious problems. Be sure to change Q-tips often and be very gentle. You may need quite a bit of patience. I have heard of people harming mirrors this way, but I've had no problem. Work very slowly and stop if you are doing harm to the mirror surface. You may want to think about having the cleaning done by a camera repairman. On this subject...There are three spots that show up in my images if I shoot so the sky is in the background. They are circled in red on the linked image. (Forget the subject; I'm just using it to show the spots) They are not noticeable with any other background. So far. Always in the same place, so they are something on the lens or the mirror of my Nikon D40. I can't see them looking at the lens or the mirror. I've cleaned both with isopropyl alcohol, but it doesn't help. Suggestions? http://i48.photobucket.com/albums/f2...r213/spots.jpg -- Tony Cooper - Orlando, Florida |
#3
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Cleaning the Mirror, etc.
On 5/1/2009 2:00 PM tony cooper spake thus:
On Fri, 1 May 2009 20:14:03 +0000 (UTC), Peter Irwin wrote: inki wrote: Now, when looking through the viewfinder, one can be distracted by some dried stains that indicate where splashes of fluid hit the mirror. Is there an easy way to wash the inner parts of an slr camera body, if the problem is more than just dust? I have used 99% isopropyl alcohol and Q-tips to clean SLR mirrors without obvious problems. Be sure to change Q-tips often and be very gentle. You may need quite a bit of patience. I have heard of people harming mirrors this way, but I've had no problem. Work very slowly and stop if you are doing harm to the mirror surface. You may want to think about having the cleaning done by a camera repairman. On this subject...There are three spots that show up in my images if I shoot so the sky is in the background. They are circled in red on the linked image. (Forget the subject; I'm just using it to show the spots) They are not noticeable with any other background. So far. Always in the same place, so they are something on the lens or the mirror of my Nikon D40. I can't see them looking at the lens or the mirror. I've cleaned both with isopropyl alcohol, but it doesn't help. Suggestions? Try acetone instead of alcohol; that's what optics people use to clean lenses. As Peter said, be very very gentle. Blow out any loose dust and dirt first to avoid dragging particles across the delicate mirror surface (keep in mind that this is a first-surface mirror, so you're not cleaning glass here). -- Save the Planet Kill Yourself - motto of the Church of Euthanasia (http://www.churchofeuthanasia.org/) |
#4
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Cleaning the Mirror, etc.
tony cooper wrote:
snip On this subject...There are three spots that show up in my images if I shoot so the sky is in the background. They are circled in red on the linked image. (Forget the subject; I'm just using it to show the spots) They are not noticeable with any other background. So far. Always in the same place, so they are something on the lens or the mirror of my Nikon D40. I can't see them looking at the lens or the mirror. I've cleaned both with isopropyl alcohol, but it doesn't help. Suggestions? http://i48.photobucket.com/albums/f2...r213/spots.jpg Not on the lens or the mirror. Cannot be the mirror as it is up when the exposure is made, and any dust or marks on a lens element is totally out of focus and will have no effect on the image. The spots are actually on the sensor, or the AA filter in front of the sensor. You need to clean the sensor, or get it cleaned. Tons of info on how to do this on google. Colin D. |
#5
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Cleaning the Mirror, etc.
On Sat, 02 May 2009 10:14:23 +1200, "Colin.D"
wrote: tony cooper wrote: snip On this subject...There are three spots that show up in my images if I shoot so the sky is in the background. They are circled in red on the linked image. (Forget the subject; I'm just using it to show the spots) They are not noticeable with any other background. So far. Always in the same place, so they are something on the lens or the mirror of my Nikon D40. I can't see them looking at the lens or the mirror. I've cleaned both with isopropyl alcohol, but it doesn't help. Suggestions? http://i48.photobucket.com/albums/f2...r213/spots.jpg Not on the lens or the mirror. Cannot be the mirror as it is up when the exposure is made, and any dust or marks on a lens element is totally out of focus and will have no effect on the image. The spots are actually on the sensor, or the AA filter in front of the sensor. You need to clean the sensor, or get it cleaned. Tons of info on how to do this on google. Colin D. Found this on the web in a forum responding to a problem just like mine: Sounds like you found the "sensor", really a filter or glass over the sensor. When you remove the lens, you see the mirror. Put the camera in bulb mode and lock the shutter open, and that's the "sensor". Ensure that you have plenty of battery power (or are hooked up to the AC/DC adapter) before you stick anything into the sensor cavity. If the shutter closes while you have something in the cavity, the shutter will break, and you will need an expensive repair. I have to clean my cameras often, since I shoot outdoors and change lenses many times a day. I have found that compressed air takes care of most problems, and a $10 bulb, like Mark mentioned, is the best way to go for field work. If you are willing to put a little more $$ into it, get an oil-less diaphragm compressor for an airbrush, ~$100. The other nice thing about air is that you don't put anything in the shutter cavity. DO NOT use "canned air", these little cans with compressed air in them. They contain isobutane and other hydrocarbon propellants which can "spit" out of the can and leave spots on the sensor that will require a liquid cleaning to remove. -- Tony Cooper - Orlando, Florida |
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