The Horseman 65mm f/4.5 Grandagon-N Lens is a Rodenstock 65mm f/4.5 Grandagon-N with a standard Copal #0 shutter, but built into a Horseman-specific helical focusing mount and barrel assembly made to fit upon their SW612/SW612 Professional medium format cameras. Used with a 6x12 film back, this lens produces a moderately wide 81° x 47° field of view, and upon the 612 cameras the helicoid focusing mount allows a minimum focusing distance of 2.3' (0.7m). Generous amounts of shift are also permitted (only on the 612 Professional).
The 65mm f/4.5 Grandagon-N is a highly-corrected 8-element lens design with an f/16-22 recommended working aperture and a bright f/4.5 maximum viewing aperture to aid focusing in low light. The use of the optional #29227 center filter (HOCF65SW) is recommended for critical work, especially with transparencies.
|Optical Construction||8 elements in 4 groups|
|Covering Power||105 degrees|
|Image Circle @ Infinity||170mm diameter|
|Shutter Speed||1-1/500 sec., T, B|
|Slip-on Cap Sizes||60mm front, 51mm rear|
|Minimum Focus Distance||2.3' (0.7m)|
|Weight||1.15 lbs (520g)|