As SLR users, we are all aware of the many components and features of the cameras we shoot with every day, because the SLR has become the universal standard for today's professional and serious amateur photographers. But where did this highly successful camera design come from, and what turned the SLR into the success that it is today?
There are a number of reasons and advantages for choosing to shoot with wider-aperture lenses. Included are the ability to capture sharp, low-light imagery at slower shutter speeds, quicker autofocus and exposure response times—which in turn reduce shutter lag times—and the option to capture your subject in a narrow, selective band of focus.
When qualifying a photograph as being good, amazing, strong, or merely so-so, one of the main criteria for giving a thumbs up or thumbs down to a photo has to do with the composition of the picture and how well the subject fills the frame.