Canon EF 50mm f/1.4 USM
Facts
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estimated retail price 380 EUR
in my use from 7/2006 to 11/2008
was the most used lens in my setup for two and half years
Pros
good image quality: nice colors, high contrast and good sharpness
usable even at f/1.4 (although better at f/2.0)
has a reliable and quiet autofocus
small
lightweight
Cons
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shows some chromatic aberration on high contrast edges
after tens of thousands of shots started to show an issue on iris control: the blades wouldn't return to fully open state resulting “Err 01” on the body