Macro Lens 邊支好?

stay with Canon 100mm, macro lens ...
I have Canon 50mm macro lens for protrait, and also 一般影下花,影下蟲...... :)
examples for you :
http://picasaweb.google.com/liuyifeng/ExtremeMacroFlower/photo#5040429211544145106
http://picasaweb.google.com/liuyifeng/Insect/photo#4990222679922376722
( and I like it less-heavy compare to 100mm macro, however, 100 mm macro,
does not need to get that close compare to 50mm :P, trade off la)
stay away from the other brands, since Canon provide the best value Macro Lens.
Both Canon 100mm macro and 50mm macro is highly recommended, the sharpness is unbeatable .... Don't worry about the price, it worth every dollar :)

Canon EF 100mm f/2.8 USM Macro
Tamron SP AF 90mm f/2.8 Di Macro
Sigma AF 105mm f/2.8DG Macro

呢三支我都用過 (我都係 350D 用家), 最終選擇買 Tamron 那支, 主因如下:
Sharpness 計, 三支真係近乎完全無分別 (我眼睇唔出, 外國網站以數據化的評測亦顯示分別極少)
操作性能方面, Canon 最佳, 因為有 Internal Focus, 鏡筒不會伸縮. 但影一般花花草草我會覺得無影響. 對焦更加唔係問題, 微距拍攝絕大多數使用 MF, 即使有 USM 的 Canon 鏡頭也因為對焦行程比較長而顯得無想像中咁高速. 但 Tamron 比 Canon 平了千多元.

因為 Sigma/Tamron Macro 鏡前組鏡片深陷入去, 因此唔買 protecting filter, 唔用 lens hood 都 ok (不過呢兩支鏡都有送). 但係 Canon EF 100mm Macro 前組鏡片比較出, 為穩陣計都要用 filter + lens hood, 於是又有額外洗費.

Tamron 比 Sigma 輕身兼且便宜, X 成店購買 Tamron 又有 5 年保用, 絕對抵用.
Tokina 聽聞質素都好, 但未用過唔敢評.

影蟲呢, 90-105mm 呢個焦段都係唔太適合, 因為要「隊」到好近, 容易嚇走蟲. 使用長焦 Macro 較佳, 我會建議使用 Sigma AF 150mm f/2.8EX DG HSM Macro 或 Tamron SP AF 180mm f/3.5 Di Macro.