I have an RZ with the 50mm 4.5 W and the 75mm 3.5...I think it is an "L" lens. Both a very satisfactory lenses. I have never owned or used an RZ 65mm lens. The 75mm 3.5 lens was discountinued due to poor response in the market place...I am guessing. Certainly it is a top notch RZ lens but it is fairly rare.