The 70D comes out swinging with dramatically superior video autofocus performance; its "Dual Pixel CMOS AF" hybrid autofocus system really is a game changer. Video AF is buttery smooth and precise on the 70D, with virtually none of the focushunting present on other DSLRs. If you're looking primarily for a video shooting tool, you can stop reading now: go to one of our affiliates and purchase the 70D immediately. The 70D also offers some additional amenities you won't find on the D7100: a touchscreen, builtin wifi and an articulating screen.
Whereas the 70D brings revolutionary new technology to the table, the D7100 offers a solid upgrade to the D7000, with more traditional amenities such as dual card slots and vastly more focus points for nonlive view still shooting.
The D7100 really sets itself apart from the 70D in image quality, providing more ISO headroom and dynamic range. You'll also enjoy better fine detail from the D7100, thanks to its lack of a low-pass filter. However, this means you may see some moiré, so steer clear if you often photograph repeating patterns like fabrics.
If video isn't the be-all-end-all of your craft, your decision comes down to balancing the amenities offered by the 70D with the superior image quality and more traditional approach of the D7100. Fortunately, you'll be thrilled with either option.
Solid, ergonomic body design; Stunning, highly detailed photos, thanks to 24.1MP sensor upgrade and removal of optical low-pass filter; Cool 1.3x crop mode extends reach to nearly 2x the full-frame equivalent; Records Full 1080p HD video at up to 30fps with full-time AF; Many pro-level features packed into a consumer-friendly body at reasonable price.
Shallow buffer that hampers continuous burst shooting; AF slightly slower than average for its class; No real-time aperture control while in Movie mode (among other quirks); More noticeable moire patterns and aliasing artifacts (but only found when shooting fabrics with strong, distinct patterns).
Dual Pixel CMOS AF delivers full-time continuous autofocus (with phase detect at every pixel in framing area) for video and Live View still shooting; Full HD (1080p) video recording with pro-level features and quality; Improved resolution and good high ISO performance; Excellent Wi-Fi remote shooting with full exposure controls; 3-inch articulating LCD touchscreen.
Image quality only improved slightly over 60D; Dynamic range still lags behind competing models; May not feature enough upgrades to convince people to step up from 60D.
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