Harry P wrote:
Watching the Red Arrows is a massive part of British Culture!!! always a thrill to watch them, even at my more local Airshow called Airborne in Eastbourne! I am using the same body that I had used for the first time I went to RIAT, the Nikon D5100 which I inherited from my late grandfather as well as the 70-300mm telephoto. Yes, I was using Continuous servo AF for RIAT, I heard that its a different name for canon DSLR's. What is the back-button focus?? is that the button called 'AE-L/AF-L'??
BBF is reassigning the focus to a button on the back of the camera (hence back-button). So, you can hold the focus with your thumb, not having to worry about the level of pressure needed to engage the AF. Then, you just fully press the shutter with your index finger. BBF isn't required, just many people's configuration for action shooting. You can goggle the set-up process from utube for your D5100.