Summary: The EF 85 1.8 USM is Canon's shortest full frame telephoto lens. The fast aperture and flattering perspective of this focal length make it ideal for portraits and candids. When shot wide open, the shallow depth of field creates beautiful background blur (bokeh) and makes the subject pop. Such shallow depth of field requires attentiveness to point of focus: lock AF on the most important feature of you subject, e.g., eyes for humans or animals.
Excerpt: I just got into headshot photography, and let me tell you.. I'm head over heels with this lens.The depth of field is shallow, which totally melts the background. Beautiful bokeh.There's a long-standing debate between 50mm and 85mm for portraits, but I think the 85 is better: less distortion, and you have to be a comfortable distance from your subject to get a good shoulders-up shot.
Excerpt: I have used this lens on one wedding job for head shots and during the reception with a flash. Tack sharp, very good boken, fast focus. No regrets on the purchase of this lens. It added another perspective to capturing the events of the day that the clients were very pleased with.
Pros: Consistent Output, Fast / accurate auto-focus, Lightweight, Nice Bokeh