The slowest lenses tested have an aperture of F., and since no lens is at its best wide open, I also tested at F.. 더 빠른 렌즈는 보카의 모양을 볼 수 있도록 더 낮은 F 스톱에서 테스트했습니다. Some tested lenses have as few as seven aperture blades, nine was common, one has blades.