I was a little unsure about the 40mm f/2.8, but i wanted something small for travel and general use without sacrificing qualify. Reading all the MTF charts and positive reviews on this lens, i went ahead and bought it. My first impression after taking the first shot was WOW. I'm really impressed. It exceeded my expectations. This lens is extremely sharp, easy to handle, great Bokeh even though it's only 40mm. Focus may not be the fastest but it's pretty fast and will work great for most situations. Here are few portrait shots taken with this lens. It was a cloudy day, no other lights used. Shots were between f/2.8 and f/9 on a 5D Mark III. The only thing done is post was crop, vignetted few images for added effect, and adjusted white balance.
http://eprogramers.com/40mm/1.jpg
http://eprogramers.com/40mm/2.jpg
http://eprogramers.com/40mm/3.jpg
http://eprogramers.com/40mm/4.jpg
http://eprogramers.com/40mm/5.jpg
http://eprogramers.com/40mm/6.jpg
http://eprogramers.com/40mm/7.jpg
http://eprogramers.com/40mm/1.jpg
http://eprogramers.com/40mm/2.jpg
http://eprogramers.com/40mm/3.jpg
http://eprogramers.com/40mm/4.jpg
http://eprogramers.com/40mm/5.jpg
http://eprogramers.com/40mm/6.jpg
http://eprogramers.com/40mm/7.jpg