In reply to The Lemming:
With regards shutter speed, it depends what you want. If you want or frozen background then go fast. If you want that nice blurred background that suggests speed then go slower. You’ll want 1/100 or so for props, so that the props actually look like they’re spinning.. if you go for 1/1000 then they’ll look still and like it’s about to drop out of the air. Jets you can obviously get away with a higher lowest speed as there’s no visible moving parts to them, but the desire for a motion blur background still comes in to play.
Focal lengths will vary depending on size of the aircraft, position you’re in and how good you are. Getting a sharp aircraft with a 400mm requires much more precise panning than it does with say 200mm. But again, it depends what you want artistically, a wider shot encompassing some of the environment? Or a tight shot of the cockpit?
Most of the skill is in keeping patient and keeping a watchful eye out. You don’t always hear them coming until literally the last couple of seconds sometimes. The hawks are easier to spot as they tend to have their front light on so you can see them against the landscape. Don’t always assume that if a jet passes it’s the only one.. often they’ll be in a 2 or 3 and again it’s not always obvious until another whizzes past as you’re admiring your handiwork from the first.
Mostly though, be prepared to be amazed, but be ready to be disappointed 😂