The Apo-Grandagon series incorporate new glass combinations including ED(Extra-low Dispersion) glasses making apo-chromatic correction of super-wide angle lenses possible for the first time.
The high maximum aperture of f/4.5 makes adjustments easier, and the working aperture of f/11-16 allows shorter exposure times for outdoor work. The use of an optional Rodenstock center-filter is recommended for critical work. This lens is mounted on a matched focusing mount with a mounting plate specific to the Horseman SW612 and SW612 Pro cameras.
Focal Length Equivalents:
35mm lens/6x12cm format = 13mm lens on the 35mm format
35mm lens/6x9cm format = 17mm lens on the 35mm format
35mm lens/6x7cm format = 20mm lens on the 35mm format
NOTE: The 35mm Apo-Grandagon on the 612 format does not allow for the shift facility of the SW612 Pro model camera. This combination produces an exceptionally wide-angle image and is currently the only convenient way to get this type of image. Use of an optional center-filter is also highly recommended with this lens when used on the 612 format in all photographic situations.
