85/1.8 | 50/1.8 |
- all figures in center 50/1.8 are little better than 85/1.8
- for 10D, 20D, 350D, with x1.6, you only need to consider from 0-13mm, then 50/1.8 is not bad. And for portrate people, most important area is center.
- 85/1.8 has better natural blur at F1.8
Here is a very good link for how to use the chart to choose lense. http://fotogenetic.dearingfilm.com/how_to_choose_a_lens.html