Day 4: If one way to overcome problems associated with low light is to shoot at a wide aperture, then you need a wide-aperture ("fast") lens. Most kit zoom lenses only open to around f/3.5 or f/
4, and fast zooms that maintain a maximum aperture of f/2.8 throughout the zoom range cost a mint. So, how do you get a fast lens without parting with large amounts of cash?
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