Related to “Spots” in my pictures. :-(, I've discovered these lovely purple spots in all of my recent (1500ish) shots, but they're much different than his smudges.
I'm shooting with a Nikon D5000 + Sigma 10-20mm. Here's a crop from a random shot (edited in LR to make the dots more distinguishable):
What does it mean and what can I do about it?
Answer
These are probably the result of defective pixels on the image sensor, and are commonly referred to as "stuck", "dead", or "hot" pixels.
This is a common occurrence with image sensors. There are several ways to deal with this problem:
- Replace the camera - this is probably the most expensive solution
- Replace the sensor - this may be as or more expensive than replacing the camera
- Sensor pixel mapping - this is often an option that can be used to avoid changing the hardware. If you send your camera in for support, the technicians can tell the software to ignore the dead pixels.
- Software mapping - there are different software tools that can be used to ignore dead pixels, but usually these work best if shooting RAW.
- fixing them by hand - this is time consuming, but you can just hand edit your images
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