Nikon D7100 review – The competition
As Nikon’s high-end APS-C model, the D7100’s direct competition is the Sony Alpha 77, the Pentax K-5 IIs and the long-standing Canon EOS 7D. There is competition within Nikon’s own product line, too, from the D7000 and D5200.
Image: Pentax K-5 IIs
The Alpha 77, D5200 and D7100 are all 24-million-pixel models, which is a class-leading resolution for an APS-C-format sensor. The D7100 is the first model with this resolution without an anti-aliasing filter. The Pentax K-5 IIs also has this filter removed, but has a 16.3-million-pixel resolution. 
Image: Sony Alpha 77
The Alpha 77, K-5 IIs and D7100 are all very well built, encased in weather-sealed, magnesium-alloy bodies. The AF system of the D7100 is the most sophisticated, while the Alpha 77 has the advantage of a fully articulated LCD screen and faster frame rates.
