When attached to a lens having a focal length of F, a 1.4Ã TC results in an effective focal length of 1.4ÃF, whereas a 2Ã TC results in an effective focal length of 2ÃF. Thus, a 400mm lens with a 1.4Ã teleconverter attached provides the same magnification as a 560mm lens, since 1.4 Ã 400 = 560. Similarly, a 400mm lens with a 2Ã converter produces the same magnification as a true 800mm lens. For birders, teleconverters can be a godsend.
The best handgun for law enforcement is one which fits the individual user. It should have no external safety which makes for ease of use.Everyone gets all fired up over caliber and âstopping powerâ. There is no such thing as stopping power itâs all about shot placement.est Answer. The best handgun for law enforcement is one which fits the individual user. It should have no external safety which makes for ease of use. Everyone gets all fired up over caliber and âstopping powerâ.
And in 2013, most local police departments (78 percent) were using some kind of personal surveillance technologyâincluding dash-mounted, body-worn, and weapon-attached cameras. That means most law enforcement officers (78 percent) were at least potentially equipped with a camera.aw-enforcement agencies themselves are already moving ahead, however. By 2013, almost one-third of all local police departmentsâ32 percent, or 3,900 departmentsâwere equipping at least some patrol officers with body-worn cameras, according to the Bureau of Justice Statistics.