لنزهای دوربین‌های دیجیتال SLR

When you buy a digital SLR, you are not simply purchasing a camera, but investing in a whole “system.” One of the biggest advantages of a single lens refl ex (SLR) camera, compared with a digital compact, is the ability to change lenses. This allows photographers to select the lens and focal length best suited to the subject or situation—this unrivaled flexibility makes an SLR the perfect choice for beginners, enthusiasts, and professionals alike.