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Canon EF 100mm f/2 USM

Review Date: Aug 23, 2009 Recommend? yes | Price paid: Not Indicated | Rating: 8 

Pros: Fast and accurate AF(after calibration in my case), Sharpness at F2, Good Bokeh, Compact size
Minor Chromatic Aberration in high-contrast situation

As I wrote in my previous post, my EF100/2 misfocused on 450D shooting from mid-distance. It was calibrated by Canon's post-sale service recently, and the AF is fast and accurate now.

Now I have almost nothing to complaint about this compact and cheap lens except minor chromatic aberration in high-contrast situation. I guess this is the most obvious gap in image quality between this lens and the famous 135L.

Generally I think this is a very good lence. You could see sample pics compared between different Canon lens from the link below. In mid-tele range, this is the third best Canon lens. The only two better than it are 135L and 220/218 which are much more expansive.

Canon EF 100mm f/2 USM

Review Date: Apr 29, 2009 Recommend? yes | Price paid: Not Indicated

Pros: Compact, sharpness in close distance
not sealed very well, is apt to get dust in purple fringe at large F stops, not just F2 misfocus in longer distance every time, on my 450D!

I bought this lens more than 2 month ago, brand new.

I strictly tested its focus in close distance on my 450D, using a vertical test card. The result was satisfactory: very fast and accurate. The only thing boths me is the serious purple fringes at F2 if high contrast exists.

Within about 4m it is a great lens, capable of producing nice headshots. But if I shoot from more than 5m away(at F2 of course), it misfocuses every time. When distance goes to 10m, I can clearly see the DoF one or two feet in front of my main subject. So the autofocus is almost useless. I'm not sure it's lens' fault or my 450D's, and these two are going to be sent to Canon for calibration when I got my time. Canon's service in China is quite poor, the calibration could only be done in 2 cities: Beijing and Shanghai.

I've conducted a test under relatively strict condition, and the [email protected] of this lens is a little bit better than my tarmron A16([email protected]@5.6)

The first time I use this lens outdoor, a midium sized dust got into it. So I can not give any credible to it airtightness.

As everyone knows, on an APS body, its background blur is far from as good as on an FF.