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.
Many agencies are opting for this cartridge as a result of its long range ballistics. The .308 Win. has a maximum effective range of about 800 yards. While this is certainly more than enough for most law enforcement scenarios (law enforcement snipers rarely have to engage targets at more than 100 yards), the .300 Win.Mag.any agencies are opting for this cartridge as a result of its long range ballistics. The .308 Win. has a maximum effective range of about 800 yards. While this is certainly more than enough for most law enforcement scenarios (law enforcement snipers rarely have to engage targets at more than 100 yards), the .300 Win.