John Black
Active member
F2.x is plenty fast for a portrait lens because of the larger digital negative and larger FOV. For a tight portrait you'll step into the shot 2, maybe 3 steps closer than you will with a 35mm FF-dSLR. Stepping into the shot shortens the DOF. On a 645 system F4-F5.6 works well for shallow DOF for portraits. Since the S2 sensor is smaller, maybe F3.5 to F4.5 instead.
Another way to fill the frame is to use a longer lens. 200mm fills a 645 negative nicely and works well for head shots. The Mamiya 200mm F2.8 APO has a very thin DOF @ F2.8. The attached image is F2.8 with the Mamiya 200mm APO on a P25 back.
Another way to fill the frame is to use a longer lens. 200mm fills a 645 negative nicely and works well for head shots. The Mamiya 200mm F2.8 APO has a very thin DOF @ F2.8. The attached image is F2.8 with the Mamiya 200mm APO on a P25 back.