Variable neutral density (ND) filters are handy tools for photographers, in that their opacity can be adjusted simply by rotating them. So, why not use them for adjustable-tint sunglasses? Well, ...

Since the 1800s, photo filters have been used to apply different effects to photographs. Nowadays, many of these filters are no longer relevant, due to the increasing capabilities of editing programs ...

Lens filters are terrific tools for photographers, be they gradient filters, neutral density filters, circular polarizers, color filters or all manner of others. But when you've got a bag full of ...