Lately I have noticed some dark spots when I look through my viewfinder. These are probably dust particles. I tried to narrow down where they were and it appears that they are somewhere on the prism of the viewfinder.
Here is how I narrowed down by using process of elimination: - Took out lens and cleaned it, spots where still there like before. - Put on another lens which is barely used, I still see the spots exactly like before. - The spots do not appear in the pictures, so the sensor is fine.
When I took out the lens and brushed a little on the prism, the spots moved but they are still there.
Can you please advise whats the best way to clean them. I don't want to mess around with the optical pieces without knowing what I am doing.
I have Nikon lens pen and a Nikon microfiber cloth. What do I need to get it cleaned?
#1. "RE: Cleaning viewfinder - D90" In response to Reply # 0
Tallahassee, Florida, US
You're probably seeing dust on your mirror. You can take the lens off, point the camera down (so gravity will help get the dust out of your camera), and use a blower like a Rocket Blower to blow the dust off your mirror. An alternative is to get an ear syringe at a drug store and use that as a blower. I've done that successfully, but long-term, it's not a bad idea to get a blower made for the purpose, as it's likely the dust will return at some point.
You don't need to touch anything with anything inside your camera. Just get a blower and the air will blow the dust off your mirror.
#2. "RE: Cleaning viewfinder - D90" In response to Reply # 0
Dust on the mirror doesn't show up that much if at all. It's dust on the focusing screen which is just below the prism. The dust can be on the bottom of the screen where you can blow or brush it off, or it might be on top of the screen in which case the screen would have to be removed for cleaning. Don't try to clean the mirror other than gentle blowing.