The New WRE-2019 19mm lens from Cambo is designed for the Cambo WRS series of cameras and the Phase One XT.
Using the optical parts from Nikon's PC-19 the lens has been rehoused and fitted with a controller for the electronic aperture.
The image circle is large enough to cover the sensor of an IQ3/IQ4 back and still permits about 4mm of shift. Edge-to-edge sharpness is excellent.
Since the lens has no leaf shutter, one has to rely on the On-Sensor shutter as used in digital backs like Phase One IQ3/IQ4 and the Hasselblad CFV-II 50c.
Image circle of lens at f/8: 71mm
CCD size 33x44mm: 12/10 mm
CCD size 40x54mm: 4/3 mm
WRS: Up / Down / Left / Right: 25 / 15 / 20 / 20mm
1600: Up / Down / Left / Right: 20 / 20 / 20 / 20mm