LeicaR Apo-Macro-Elmarit-R 100/2,8
Lens mount: Leica R
Diameter: 73 mm
Length: 104 mm
Weight: 790 g
Filter mount: E60
Lenses/Groups: 8/6
Diaphragm blades:
Max Aperture: 2,8
Min Aperture: 22
Close Focus: 0,45 m
Misc: MF, Single, APO, Depth-of-Field Index, Lens Shade Standard, MacroLens, FocusIndex
Photodo test result: 4,5
Effective focal length: 99
Weighted MTF for 100 mm: f2,8 0,87, f4 0,88, f8 0,84
Average Weighted MTF: 0,85 Grade: 4,5
Weighted MTF 10 lp/mm: 0,91
Weighted MTF 20 lp/mm: 0,83
Weighted MTF 40 lp/mm: 0,65
Distortion: % - %
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Tamron SP 90/2,5 macro
Lens mount: Tamron Adaptall
Diameter: 68 mm
Length: 102 mm
Weight: 410 g
Filter mount: 55
Lenses/Groups: 10/9
Diaphragm blades: 9
Max Aperture: 2,5
Min Aperture: 32
Close Focus: 0,39 m
Misc: MF, Single, MacroLens
Photodo test result: 4,2
Effective focal length: 87
Weighted MTF for 90 mm: f2,5 0,68, f4 0,81, f8 0,85
Average Weighted MTF: 0,83 Grade: 4,2
Weighted MTF 10 lp/mm: 0,91
Weighted MTF 20 lp/mm: 0,81
Weighted MTF 40 lp/mm: 0,60
Distortion: % - %

以上是LeicaR Apo-Macro-Elmarit-R 100/2,8及Tamron SP 90/2,5 macro
的測試資料性能表現相差不多,但價格呢???
如果錢不是問題當然選最好的
畢竟100m短跑的世界冠軍跟最後一名相差不超過1秒
追求極致的在意的就是這些微之差吧我嗎還是高c/p的信徒