The following is a guest blog by Jorgen Guldmann:
Everyone needs at least one GOOD 50mm lens (I got a fair amount). In my opinion a good 50mm lens must be versatile, with a nice bokeh, fast to accommodate for less available light, and sharp when stopped down to aperture below f2. There are a lot of 50mm prime lenses on the market, both old and new. In this little blog i am comparing 6 different pieces.. I hope you enjoy their attributes and expressions.