In a message dated 3/9/2005 11:25:50 AM Pacific Standard Time, [EMAIL PROTECTED] writes: I don't understand. If the dust is in the sensor, *behind the lens*, how would the aperture used affect whether you see it or not?
Does it have to do with the angle at which the light hits the sensor? Then why does focus matter? j ======== Well, it's because you're not focusing on other things, other things aren't in the frame, so then you can see the dirt. This is what Lepp suggested to see if you have any dirt on your sensor: 1. Use any lens, but telephotos seem to work best. 2. Focus on a clean blank wall, preferably gray (mid toned). 3. Set the camera on automatic. 4. Stop down to f/22. 5. Throw the camera out of focus. 6. And possibly overexpose or compensate by 1 stop. (Hard to read my notes here.) He said since you're not focusing on anything the dirt will show up, bingo. Sort of like looking for dead pixels. And he also said you'll be amazed about how much junk is on your sensor. Lepp explained, when you are actually shooting pictures, the smaller the f stop the more it shows up, especially in the sky. That's when you'll notice it. Think about it. HTH, Marnie (Who is sort of afraid to try it.)
