Max Shutter speed
Nikon 1 J3 can shoot continuously at max speed of 15 fps
and has max shutter speed of 1/4000 sec
. 1 J3 also has an electronic shutter which can shoot silently at max speed of 1/16000s
. One thing to keep in mind is that electronic shutter may cause rolling shutter / jello effects, and also banding issues under artificial light on your images.
Unfortunately 1 J3 doesn't have an external flash shoe so you are limited with the built-in flash.
Nikon 1 J3 features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 135 focus points and 41 of these sensors are of Cross-type. Cross-type sensors locks focus faster and more accurate compared to single type sensors.