I have a D40 so manual focus is my only option with either of these lenses... The thing is, I've had a 50mm f1.8 lens for about 3 months and the focus ring was BUTTERY smooth to turn. I just sold that lens last week and ordered the 50mm f1.4 to replace it. Optically, I love the lens... but I'm wondering if I may have gotten a defective product. The focus ring on the f1.4 lens "clicks" as I turn it. It almost feels like a volume knob on a car stereo where you feel little "bumps" as you turn the knob... Is this normal? I've had some people tell me it's normal... while others tell me their focus rings are totally smooth.