The built-in flash unit is the same in both cameras, but the Nikon D7100 has the advantage again because it can be used in ‘commander’ mode to control other external Nikon Speedlights remotely.
For most users it’s not a must-have feature, but it could be important for enthusiasts or pros who work extensively with flash.
Technically, the Nikon D7100’s 3.2-inch display beats the 3-inch display on the D5200. It’s larger, and it also has a higher resolution of 1,229k dots versus 921k dots.
But (and it’s a big BUT), the Nikon D5200’s display is fully articulating, making it much easier to shoot macros, movies, waist-level, ground-level and overhead shots.
We say this gives the D5200 a major advantage when you’re composing shots in Live View.
The D5200 uses a relatively slim EN-EL14 battery, where the D7100 uses a fatter EN-EL15. We don’t have official battery life figures, but the Nikon D7100 can go significantly longer between charges, especially if you use the Live View mode for any length of time.
The Nikon D7100 is very compact for an enthusiast’s DSLR, but it’s still a few millimetres larger than the D5200 in width and height, and a massive 210g heavier.
Many people won’t mind the extra size and weight, but if space in your bag is limited and you like to travel light, the D5200 comes out on top.
There is a downside to the Nikon D5200’s miniaturisation, though, in that people with large hands may find it awkward to hold and operate.
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