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In a winter photography excursion armed with a Sigma SD1 camera and a challenging 500mm lens, the goal was to create an image that combined precision, abstraction, and the artistic potential of the Foveon sensor.
Modulation Transfer Function (MTF) is used to describe how well a lens captures and reproduces details. This article explores the factors contributing to a high MTF.
The lens I most regret parting with is the Cooke PS945 soft-focus portrait lens. I let it go when I transitioned from 4×5 portraits to medium-format digital, primarily with ALPA cameras and lenses. I needed the money, so I sold it for the same $3,500 I had originally paid.