有冇人留意呢兩支EF鏡?
Canon has just filed two new lens patents: EF 17-70mm F3.5-5.6 consumer zoom and EF 16-60mm F3-5-6.3 consumer zoom. Canon EF 17-70 F3.5-5.6 consumer zoom
US Patent Application 20180275370
Focal Length 17.40 35.00 67.98
F-Number 3.23 4.10 5.85
Image Height 21.64 21.64 21.64
BF 38.38 53.37 84.83
Canon EF 16-60mm F3-5-6.3 consumer zoom
US Patent Application 20180275370
Focal Length 16.30 24.10 58.00
F-Number 3.59 3.94 6.37
Image Height 21.64 21.64 21.64
BF 38.42 45.65 83.75
平價又實用焦段