Camera Lenses and Filters

Butterworth Filter: A Glace of an Effective Filter
Filters are divided based on the functions they perform. It is done by the ranges of frequencies. One of them is the low-pass filter. The Butterworth filter is an ideal example of a low-pass filter. It is superior to image-parameter filters (constant-k and m-derived) in their efficiency and response characteristics. It is formed by a series of branches that are connected in series or shunt with source-to-load path individually.

In filters like the low-pass and high pass, each branch is either an … Continue Reading