The 150mm f/3.5 is a short telephoto utilizing Mamiya's low dispersion glass with superior performance at all apertures. Many table top, studio, portrait and fashion photographers find it an excellent choice for all purpose photography. It allows slightly closer working distance for portraits than longer lenses, facilitating a more informal and intimate approach. Applications include portraiture, fashion, beauty, landscape and studio product photography. Equivalent to 73mm in 35mm format. Equivalent to 73mm in 35mm format.