One of the most popular lens focal lengths out there is the 50mm--but they're sometimes worthless if they can't focus quickly. Whether you're a professional or hobbyist photographer, there isn't a reason why you wouldn't want to have a fast focusing 50.
Foodies can rest assured knowing that their 50mm lens will lock focus quickly onto dinner. When you're capturing your corgi running around and doing corgi things, you'll know that the image you snap will be bound to get you some karma points on Reddit. . thephoblographer.com