I am still new to all of this, and want to shoot handheld with a 5DM3. I have a 24-70mm, 100-400mm, and a 70-200mm.
To shoot without a tripod and without any handheld blur, can I always use the shutter speed rule of 1/70 for the 24-70mm, 1/400 for the 100-400mm, and 1/200 for the 70-200mm? OR...