Division of Periodic Table into s-, p-, d- and f blocks on the Basis of Electronic Configurations. The long form of periodic table can be divided into four main blocks. These are s-, p-, d- and f-blocks. The division of elements into blocks is primarily based upon their electronic configuration as shown in Fig. 6.2.
What is it? The EquiCam is the ultimate piece of filming equipment for equestrian sports, a miniature super light weight camera (just 38g) and two special riding hat camera mounts (elastic hat strap and a hat mount). Film your rides in full 1080p HD for fun and for safety.
Full-time manual focus override is another benefit of shooting with Canon EF lenses. As accurate as Canon AF systems are, there are times you want to tweak the focus for one reason or another. With most Canon lenses, changing focus on the fly is simply a matter of rotating the manual focus ring.