Causes of Warts. Skin warts are caused by a virus known as human papilloma virus (HPV). There are over 100 sub-types of this virus but only a few infect humans to cause warts on the skin. The virus enters the skin cells and replicated like all viruses do but does not extend beyond the skin.
With top speed full resolution shooting at between 4.5 and 6.5 fps (frames per second) these cameras are not going to be ideal sports shooters (that's where full frame DSLRs like the Nikon D4S and Canon 1D X come into their own).
Canon FTb. The Canon FTb is a manual focus SLR that was introduced by Canon, Inc. in March of 1971. It was introduced alongside the professional-level Canon F-1 and was intended for advance amateur use. It was a solid, well-designed camera that has withstood the test of time. It has quite a cult-following among Canon FD-lens afficianados.