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01/23/2010 09:54:09 PM · #1 |
| so i just bought a used lens that is still in fairly good condition, there were some specks of dust inside the front element. it never showed up in any of the photos i took, but tonight i took some long exposures and there was specks EVERYWHERE and i was just wondering if that would be the specks in the front element or dust on the sensor. |
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01/23/2010 10:02:27 PM · #2 |
| Take the same duration exposure with one of your other lenses (using a narrow aperture). If the specks are in the same location then it is dust/dirt on your sensor. |
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01/23/2010 10:04:12 PM · #3 |
FWIW, dust specks that show up on photos are almost never in the lens, they are nearly always on the sensor.
Check you sensor by taking a photo of a completely blank white wall (or sky) at f/22. You'll be surprised how much crap shows up!
Message edited by author 2010-01-23 22:05:10. |
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01/23/2010 10:08:11 PM · #4 |
| ok that definitely sounds like it cus i was shooting at an extremely narrow aperture. thanks guys |
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