Older cameras (and some newer ones) use mechanical shutters that creep out-of-spec over the years, so [Dean Segovis] built a handy shutter speed tester. With just a handful of basic components ...

We're working towards our full review of the Sigma BF, the first installment of which explains how it works and what it's ...

A conventional camera shutter works in an entirely mechanical way. The shutter is fully closed before taking a shot. At the ...