The optics in a vision setup are the first element in the imaging chain and often underestimated in his role.
Selecting a suitable lens is crucial for the quality of the final image and has an impact on many factors. Important parameters to define the quality of a lens are MTF, Distortion, uniformity, aberration, the mount,etc
Together with a lens we can also advise and offer you the appropriate lens filter (bandpass, blocking, polarised)