staion0012 wrote:謝謝各位的解答~我大...(恕刪) EF-S 15-85可以說是EF-S 17-85的升級版!光圈F3.5起跳,多了2MM,多了二片非球面鏡片,多了一片UD超低色散鏡片。兩萬多元換一顆非恆定光圈EF-S 15-85MM,根本就是換心酸的!若真的要換的話,就換EF-S 17-55 IS USM鏡皇或買超廣角鏡!