Nikon didn’t build a light metering chip into the D40. That’s fine if you’re using one of their auto lenses with the on-board chip. [Matt] decided to add a sensor to his camera and try it out with his ...

While reviewing a studio flash unit, I came across the Optivelox SS04U sensor, which I feel an obligation to present, as a budget friendly alternative to, for example, the 10x more expensive Sekonic L ...