Tripods were absolutely essential in the early days of photography, when exposures were made on glass plates with sensitivity as low as just ISO 1-3. These days, with many Nikon cameras able to capture a black cat in a coal cellar hand-held, thanks to the incredible leaps ISO capability has made, you might be thinking, do I really need a tripod? But the answer is still 'yes' for many types of images and situations – find out why in our comprehensive guide…