Excerpt: Every photographer should have one good 50mm lens with a fast aperture. This lens is part of my set of primes: 28mm f/1.8, 50mm f/1.4, 85mm f/1.8 and the 105mm, f/2.8 macro. Auto-focus is fast and quiet. Optics are sharp from corner to corner when stopped down a few stops. Almost no lateral CA. Minimum distortion. Smoothe bokeh, What's to complain about?
Pros: Consistent Output, Fast / accurate auto-focus, Lightweight, Nice Bokeh
Excerpt: Useful for keeping a slim profile when hiking or touring. Light weight. Amazing bokeh using large lens openings. Things sharpen up nicely using higher f-stops. Perfect for low light situations. Does most things well when you just don't feel like lugging a bag full of lenses.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Rugged, Strong Construction