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.
STI Lawman. Available in either 9mm or .45 ACP, the STI Lawman was designed first and foremost as a duty and defensive pistol for law enforcement officers. The gun utilizes STIâs patented RecoilMaster guide rod, a dual-spring assembly that lasts 10 times as long as a conventional single-spring assembly.vailable in either 9mm or .45 ACP, the STI Lawman was designed first and foremost as a duty and defensive pistol for law enforcement officers.