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.
A new study from the FBIâs Training Division shows that overall, the 9mm Luger pistol round is the best option for law enforcement handguns, recommending departments shouldnât switch their side arms to larger rounds considered by many to be more lethal.irst off, the FBI is saying that the 9mm is more effective for law enforcement who uses exclusively hollow points in duty ammo (not all hollow points are equal. There are plenty out there by top manufactures that fail their testing). If the police could only carry FMJ than you would be correct.