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 […]
Graduated filters are clear at the bottom but darkened at the top, with a smooth, graduated blend in between. You use them in landscape photography to tone down bright skies without affecting the land. You can also create graduated filters 'digitally' in image-editing software.