Increasingly confronted with bass made cagey by fishing pressure, many anglers are resorting to smaller baits and lighter lines. The new Shimano Core 50Mg7 ($370; is perfect for such finesse fishing. At only 51⁄2 ounces, it may be the world’s lightest, full-function baitcast reel. A magnesium frame and a perforated aluminum spool reduce overall weight. The reel, which holds 105 yards of 10-pound mono, has a 7:1 gear ratio. I field tested a prototype last fall and found its light weight made the reel just plain fun to fish. That, plus precision construction, will make the hefty price tag bearable for bass enthusiasts.