A Canon 50 mm 1.4 lens - extremely fast, crisp, remarkable focus and also bokeh!
Ultrasonic concentration.
Hoya filter has been on the lens considering that I purchased it, to shield the glass.
For specs, kindly view:.
http://www.canon.ca/inetCA/en/products/method/gp/pid/2098.
A wonderful lens!
$350 money.