Teh Pentax 45-85mm f/4.5 Manual Focus Lens is a good general purpose zoom lens which is an excellent choice for corporate public relations photography.
Designed with specially selected high grade optical glasses, the Pentax 645 lenses are of superior optical quality. They are manufactured in accordance with advanced computer-generated optical designs and rigid production procedures. Optical performance is improved by Pentax's exclusive Super-Multi-Coating (SMC), a seven-layer process that reduces reflection ratio to an exceptionally low 0.2% per lens surface.
Wide angle to normal zoom
Good for photojournalism and landscape photography