The Schneider 210mm f/6.8 Apo Digitar T Lens is a telephoto large format lens specifically designed for use with digital backs, which require extremely resolved, color correct image circles of a smaller size. Digital backs also benefit from use at larger apertures to avoid image degradation from diffraction.
This version of the 210mm Apo Digitar T is mounted to a Schneider Electronic Shutter, which is a compact shutter with speeds from 1/60th to 32 seconds, aperture control in 1/10th f/stop increments, and operation capacity from either a PC or a hand controller. Because it is such a compact shutter with a smaller maximum clear diameter than the conventional Copal #1 or other electronic models, the maximum aperture of this lens is reduced from f/5.6 to f/6.8 (otherwise it is optically identical).
The 210mm Digitar is appropriate for use with backs as large as 63x63mm, and upon such backs it records an image area similar to that of a 187mm lens upon a 6x6 format camera. It is an ideal general purpose telephoto lens for both field and studio work, remaining sharp at a broad range of reproduction ratios and capable of its maximum resolution at f/5.6. Its 120mm image circle size remains at all apertures, even f/5.6, allowing it to also be used in front of 6x9, 6x7, 6x6, and 645 format film backs to provide superior image quality versus any medium format SLR lens.
In many cases, digital photography is superior to conventional photography when the desired end product is a print. But to achieve this ideal, high demands are made upon a lens' image reproduction quality. This is because of a digital image chip's small image receiving area, which demands that a scene's fine details are squeezed into a smaller image recording area. The Digitar is capable of maximizing your digital back's capacities.