最近想入手廣角鏡頭請教下列三個鏡頭哪個C/P值較高?優缺點為何?感謝賜教(機身是Canon 650D)Canon EF-S 10-22mm F3.5-4.5 USMTAMRON SP 10-24mm F3.5-4.5SIGMA 10-20mm F4-5.6
