Sankyo Kohki 90mm f/6.3 Super-W-Komura, Copal 0 (35MT) BT Lens for 4x5 Review

The Sankyo Kohki 90mm f/6.3 Super-W-Komura is a vintage wide-angle lens designed for 4x5 large format cameras. Mounted in a Copal 0 shutter and offering 35mm of movement, it provides a moderately wide field of view suitable for landscape and architectural work. At f/6.3, it's slower than many modern large format lenses, which may limit its use in low light or require longer exposures.

This particular unit is sold used in excellent condition with caps included, priced at $292 through KEH. It represents an affordable entry point into large format wide-angle photography for those building or expanding a 4x5 system. Sankyo Kohki lenses from this era are less common than Schneider or Rodenstock optics, so finding repair parts or technical information may be more challenging. The lens fits photographers working with large format who want a budget-friendly wide-angle option and don't require the speed or movements of premium glass.