1. 2.8 very sharp , very nice bokeh even on my 50d. control CA and flare very well,
i use to shoot the bulb light oso no probem.
2. the colour ,contrast and saturation is 1st grade , if use 50d + raw i no need to edit the picture at all . (picture style 3110)
3. very useful hood . when raining it can protect the water drop into lens. i snap a event while raining and it make me proud since im the only camera who survive in the rain area ! When ppl knock your lens accidently , they feel pain instead of my lens.
4. silent af , fast af even in low light