Yamasaki Wide Angle Congo 90mm f6.3 4x5 Lens. Certified. Condition: EXC.

The Yamasaki Wide Angle-Congo 1:6.3 f=90mm is a compact Japanese wide-angle lens for 5x4 large format work. It gives a 175mm image circle at f/22, enough to cover 5x4 with room for modest rise, fall and shift, and it is small and light enough to leave mounted on a field camera. The lens sits in a Seiko #0 leaf shutter with speeds from 1 second to 1/500 plus B, X flash synchronisation, and an aperture scale running from f/6.3 to f/45. Serial number 138745. We have tested and certified the shutter. It is accurate and consistent. A certificate is supplied with our test results to assist with accurate exposures.