Even in an age of digital photo editing, there are still some lens filters that either can’t be reproduced digitally or are more effective than their digital equivalents. These include protective UV filters, polarizing filters, graduated and neutral density filters. UV filters are used these days purely as a protection for the front element of […]
A colour filter used in black and white photography to change the shade of grey that colours are reproduced as. They're called 'contrast' filters because they can change the contrast (in shades of grey) between different colours.