The new Nikon D610 was announced October 8, 2013. The main difference between the D610 and the D600 is a new shutter mechanism. According to Nikon USA, “a new shutter mechanism in the D610 affords a faster frame rate.” A new quiet continuous shooting mode (Qc) offers 3fps. The Qc mode has been added to the shooting mode dial. Normal continuous shooting has also increased from 5.5fps to 6fps on the D610.
An improved Automatic White Balance (AWB) algorithm captures better skin tones under artificial lighting.
The D610 is also priced lower at $1999 (Pre-order Nikon D610 at B&H Photo) for body only and $2599 for the kit with 24-85mm VR lens. New kits are also available with 28-300mm lens. See D610 pre-order page for more.