The Sinar Digital 180MM F5.6 Rollei lens makes optimal use of the image sensor. If you use the lens within the suggested reproduction scale and stop down two f-stops, you can get the best reproduction efficiency with this lens.This digital lens offers high levels of resolutionThis lens reduces color aberration so that you can get images without any color fringe at the edgesThe angle of view of the lens is 25°The lens forms an image circle of size 80mmThe aperture range of the Sinar Digital 180MM F5.6 Rollei lens is 5.6 to 64