Cokin, a company founded by French photographer Jean Coquin in 1978, is famous for inventing the square filter system for cameras. With such a long-standing pedigree in the filter space and kicking ...

If you’ve used a diode laser engraver or cutter, you know that focus is critical. You’d think it would be relatively simple to get a sharp focus, but it isn’t that simple. [Makers Mashup] shows in a ...