This is the desirable 45mm N wide angle lens for ALL of the Mamiya manual focus 645/m645 models. It corresponds to about 28mm in the 35mm format and is probably the most useful wide lens in my opinion. It is wide enough to get a lot into the image without being too wide or appearing distorted. Note that this is the latest version with improved optics and styling. This lens is sharp and has excellent color quality. It is also faster and more compact than similar lenses for other manufacturers. The lens is in beautiful condition and works perfectly. The glass is clean and scratch-free, the mechanical action is smooth. This is a great lens. Caps are included.