im a coach looking to film pitchers and hitters either during practice BP and Bullpen or/and during live games, currently we use sony cx-240 it does okay looking to see if i can get better frames while playback in slo-motion. We use it for feedback, we used ubersense and what ever phone did the recording this year and it was okay at best, some images your right unless you are within a certain ft radius its blurry. thanks for any feedback.
OK, so you need more optics than the iPhone6 can give you? Take a look at the Panasonic HC-V750 and HC-V770 camcorders. Both can record full HD at 120 frames per second (I think your Sony has a setting for full HD at 60 fps). Can also record at 240 fps at a lower resolution. They both have a 20x optical zoom. Prices are $500-600.