優點:
- Excellent Aperature at f/2.8, with good depth-of-field at f/1.4. very impressive.
- Light weight (vs. 17-40mm f4)
- One lens is enough; why do we need zoom lens anymore?
- with 5DII, 24mm can crop to 35mm/50mm/85mm equivalent of aps-c
- Extreme resolution; 20x on camera is as sharp as normal magification
- With hook, extreme professional looking
- metallic build - feel more proud (:P)
缺點:
- How can a "L" lens has defect? It cost 13,000HKD! extremely unacceptable
- No stock in general; Man Shing has > 10 ppl on waiting list (WTF)
- Heavy duty focusing distance; focus can take up to >90 degree movement inside, quite slow compare to 17-40mm f/4
評價:
Inside the focusing window, the micro-motor/label/etc are broken after tested 20 photos. Unbearable manufacturing quality; no matter how good the Structured-Wavelength Coating (SWC), redesign, how many UD lens used...this became a rubbish lens.
I have 17-40mm f/4 and 70-200mm f/4 used heavily with film/dslr for 7 years. Never seen such a horrible quality on "L" lens. Where is quality? Image Quality/Sharpness is not as good as Nikon already, crazy bad quality scare all Canon-fans away. providing HD-video recording is good idea: canon is now only interested in video, not still-image anymore.
Sample Images on the defect.
http://img.kakaku.com/images/Review/000/009/9158_m.jpg
http://img.kakaku.com/images/Review/000/009/9159_m.jpg