What is the difference between Sony Distagon T* FE 35mm F1.4 ZA and Pentax-D HD FA 645 35mm F3.5 AL IF? Warranty Registration Free shipping for many products! The Pentax 645 – a great “next step” Medium format opens the door to a higher level of quality and as the name implies, the Pentax 645 uses a 6×4.5 cm negative that is 2.7 times larger than 35mm. Equivalent to a 75mm lens on a 35mm camera for angle of view, so a good portrait lens too. VIEW COMPARISON ADD MORE. The lens design is based on the smc PENTAX-FA645 35mm F3.5AL[IF], renowned for its crisp image description. This allows it to draw out the optimum performance of PENTAX medium-format digital SLR cameras, while minimizing flare and ghost images. Pentax smc FA 645 45-85mm f/4.5 Lens. This wide-angle lens features super multi coating (SMC) and an equivalent focal length of 36mm, in the 35mm format. This wide-angle lens features super multi coating (SMC) and an equivalent focal length of 36mm, in the 35mm format. Ricoh has announced a new wide-angle prime for its Pentax 645D/645Z medium format digital bodies. google_ad_client = "pub-3006917534106278"; google_ad_type = "text_image"; Complementing the optical layout is an HD lens coating, which has been applied to individual elements to control flare and ghosting for contrast-rich, color-accurate results. Great in a wide range of lighting conditions Advanced optical design for high-quality images Find many great new & used options and get the best deals for PENTAX Pentax SMCP-FA 645 35mm f/3.5 IF AL Lens at the best online prices at eBay!