When shooting indoor volley ball (no flash, high ISO 1600-3200 ), I seem to get many pictures out of focus even with single point focus (continous focus), shutter release on focus lock, and the focus point confirmed on the target of interest. Due to avaiable light and budget, I shoot with a Nikon 50mm 1.4G lens. Most shots are with the aperature at 1.4, trying to achieve best shutter speed to stop action.
I generally shoot in manual mode. Initially, I would leave the lens at 1.4 and use 1/400 or so shutter speed & 1600 ISO. I have also tried shoot with differnt combinations of a) aperture more closed, 2.8 or so, for better depth of feild, b) higher shutter speed, upto 1/1000th, and c) higher ISO upto 6400. None of the combinations seems to really deliver the level of focus I expected.
Am I being unreasonable in my expectation?
Could the body, lens, or both not focus fast enough for action sports? Volleyball is fast action with players moving at the same time a) away and toward the camera ,and b) moving across the camera. I have many pictures where focus point is on target, but pic not in focus.
In many cases, the item I focus on makes up only 5-20% of the to view finder, due to the 50mm lens. Could this have an impact?
I have tried 3D continous focus at basketball game ( indoors / in stands ). Pitures looked OK on the camera LCD but were really not in focus when reviewed on my PC monitor (27"). It seems like a wall or other items where in sharp focus. The 3D tracking looked like it was operating correctly and following the moving subject while taking the pictures.
I have also tried multipoint focus too, but it seems the camera always picks the wrong point to focus on ( I generally expect the item in the center of the lens should take priority ).
Thanks for any advice.