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One of the main reasons why mirrorless interchangeable-lens cameras were designed was to provide DSLR image quality without the bulk. From the very start (the first mirrorless interchangeable-lens camera was introduced about five years ago), serious photographers wondered when—even if—there would be full-frame mirrorless interchangeable-lens cameras. In 2012, Sony introduced the RX1, a truly compact camera with a full-frame sensor (the same one used in the company's SLT-A99 DSLR), but with a fixed wide-angle lens.
Now, Sony has introduced the first full-frame mirrorless interchangeable-lens camera. The two models are almost identical with the following exceptions: The Alpha a7 features a 24.3-megapixel, full-frame Sony Exmor CMOS sensor, and the Alpha a7R has a 36.4-megapixel unit with no OLPF (optical low-pass, or anti-aliasing, filter). The a7's sensor also provides Sony's Fast Hybrid AF.
Estimated Street Price: $1,699 (a7); $2,299 (a7R)
Contact: Sony, www.sony.com