Nikon D610 vs Nikon D750
The D610 uses Nikon’s enthusiast-orientated 39-point Multi-CAM 4800 autofocus sensor, but the D750 has the professional-level 51-point Multi-CAM 3500 FX autofocus sensor with the latest enhancements, including Group Area AF. As such, it should be significantly better at handling fast-moving subjects.
02 Expeed 3 vs Expeed 4
The D610 uses Nikon’s Expeed 3 image processor, while the D750 has the newer and more powerful Expeed 4 version. This does improve the D750’s continuous shooting speed, but only by a small amount – the D610 can shoot at 6fps, while the D750 manages 6.5fps, so hardly a deal-breaker.
03 ISO range
The D750’s Expeed 4 processor does have an effect on its ISO range, though: the D610 offers a maximum non-expanded ISO of 6,400, while the D750 goes one stop higher to ISO 12800.
04 Movie mode
Both cameras can shoot full HD movies, but the maximum frame rate on the D610 is 30p, while the D750 can go up to 60p, allowing half-speed slow motion at full HD resolution.
The D750 has Wi-Fi built in, but the D610 doesn’t – you have to use Nikon’s WU-1B Wi-Fi adaptor, a small and inexpensive module that you plug into the camera.