phybron Posted July 5, 2006 Share #1 Posted July 5, 2006 Advertisement (gone after registration) A blue dot appeared on my pictures over the weekend - easy to remove, but annoying. I think the culprit is a fairly large speck of dust in the lens. Not quite sure how that got in there. Any idea how to get rid of it? And all the subsequent dust that accumulates? Link to post Share on other sites More sharing options...
Advertisement Posted July 5, 2006 Posted July 5, 2006 Hi phybron, Take a look here What do you do when you get dust in the lens of your D2?. I'm sure you'll find what you were looking for!
erl Posted July 5, 2006 Share #2 Posted July 5, 2006 I would be surprised if a dust speck on your lens would record on your image as it would not be in focus. Even quite severe scratchs may not effect your image under most conditions. I suspect your 'blue dot' is due to some other cause. Don't worry too much about the dust on internal surfaces. Your problems sounds more like an electronic problems such as a hot pixel, but I am no expert in that area. Cheers, Erl Link to post Share on other sites More sharing options...
marknorton Posted July 5, 2006 Share #3 Posted July 5, 2006 I agree, dust in the lens is not going to cause the problem you are seeing. As Phil says, the dust will be out of focus. Your problem is almost certainly a hot pixel where one of the pixels gives output independent of the light. It's exactly similar to the hot pixels you used to see quite often on lap top LCD displays but which are now, because of better manufacturing, rather rarer. If it were a black dot, it might genuinely be dust on the sensor which has got round the dust seals, something uses of digital cameras with removeable lenses are used to. You might find working at lower ISO improves things but otherwise, I'm afraid you are stuck with it and a replacement sensor is unlikely to be economically viable. Link to post Share on other sites More sharing options...
phybron Posted July 5, 2006 Author Share #4 Posted July 5, 2006 Ah good point. I'll reinvestigate - I couldn't see it on a couple of pictures I took yesterday, even though the dust is still there. Maybe the pixel unstuck itself. Stupid digital technology. Time to break out the QL17 rangefinder I reckon... Link to post Share on other sites More sharing options...
symmetron Posted July 5, 2006 Share #5 Posted July 5, 2006 I don't think it's optical; the physics don't support the lens hypothesis. Sounds like a "pixel" issue. Link to post Share on other sites More sharing options...
earleygallery Posted July 5, 2006 Share #6 Posted July 5, 2006 Post an example of an image here for better advice. If it is a 'blurry dot' it's likely to be dust on the sensor. If its clear then more likely to be a duff pixel. Either way, the easiest solution is photoshop! Link to post Share on other sites More sharing options...
phybron Posted July 5, 2006 Author Share #7 Posted July 5, 2006 Advertisement (gone after registration) I'll see if it's still doing it later. Aperture has a thing that sorts it out with one click. Still, a bit annoying. Hope people don't get dead pixels on their M8's. That would be really bad. Link to post Share on other sites More sharing options...
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