strange black dots which appeared on some images. Subsequent firmware updates removed the problem, yet Canon’s reputation suffered a little as a result. In this dog-eat-dog world of digital SLRs every little cock-up dents your reputation and may be – and often is – ruthlessly used against you. Nikon seems to release newer and better cameras at the same breakneck speed as Canon, yet their high-end gear doesn’t suffer from random and unexplained issues. So you’d think Canon wo