We have chosen a target sensor format of 36 * 49mm for the optimization of the lens performance for the HCD lens line in order to achieve a compact design with fast focusing as well as high performance. Top performance is reached even with sensors larger than 36 * 49mm. The only restriction is that a marginal crop is introduced with the HCD28 and the HCD35-90 in 35 mm setting. On a full frame 60 Mpix camera, the crop will result in an effective pixel count of 55 Mpix and a focal length factor of about 1.1
. This means that the HCD28 will be equal to a 31 mm lens and the HCD35-90 will be equal to a 38-90 mm.