Something every photographer should know but might not be aware of are dead or stuck pixels on your DSLR sensor. It’s something that is very common with DSLRs and often goes unnoticed. The reason is, apps like Lightroom4 and Aperture automatically remove them.  I only noticed it on my camera because I shoot a lot of video. None the less, you don't want them on your raws.  So here is what they are and here is how you get rid of or fix them.