A few weeks ago my 300mm fell off my monopod in the end zone of a football game. It landed in soft grass and nothing broke. Later I figured out the plate that came loose was one I didn't even need. If you use a monopod for sports photography, here's the short answer: if your lens foot isn't Arca-Swiss, the plate has to fit it. If it is Arca-Swiss, you may not need a plate at all.
The video walks through my setup with close-ups of each piece. Watch it here, then keep reading for the short version.
Most long lenses have a tripod collar, a ring around the lens with a foot on the bottom. The foot is where your monopod connects, and there are two common ways to do it.
Straight into the monopod. The foot has a threaded hole, and the monopod screws right in. Fewer parts, less weight, nothing on top to loosen. To tilt the lens, you lean the whole monopod. Plenty of sports photographers shoot this way.
With a ball head. A ball head is a small mount with a ball joint that sits between the monopod and the lens. It lets you tilt the lens without moving the monopod's foot. The cost is extra weight and one more thing that can come loose.
I use a ball head, and I keep it snug so the lens doesn't flop forward when I let go. Both times I've dropped this lens, it was on a ball head. I'd still rather fix the setup than give up the tilt. Over a full game, comfort wins.
Arca-Swiss is a standard shape: edges cut at an angle, like a dovetail, that slide into the clamp on most ball heads and lock down when you tighten the knob. Lots of brands make it, so a plate from one brand fits a clamp from another. If you're shopping, look for "Arca-Swiss compatible."
A lens foot that's already Arca-Swiss slides straight into the clamp. A foot that isn't needs a plate screwed onto it first.
I started with the small plate that came with my ball head. It's fine for a camera body but too short for a long lens, and it kept working loose. I spent time tightening a plate instead of shooting.
Next came a generic 100mm plate. Only one of its two screws fit the 300mm, and it still loosened over time. That's the plate that was on the monopod in the end zone.
Then I looked closer. The 300mm's foot is already Arca-Swiss. I'd been bolting on a plate it never needed.
Straight into the clamp, the foot holds. I want more games before I fully trust it. For now I use a Wimberley P-30, a plate made for that lens, because it slides into the clamp a little more smoothly. That's a convenience, not a requirement.
Check the foot before you buy the plate.
My Nikon Z 180-600 is different. Its foot isn't Arca-Swiss, so it needs a plate. The foot has two screw holes, and a plate held by one screw can twist. For a while one screw wouldn't catch. Putting the smaller screw in first, then the larger, got both to fit, and the plate holds better with both.
You don't need a 300mm for any of this. Look at the bottom of your lens foot. If the edges are cut like a dovetail, it may already be Arca-Swiss. If you're not sure, check the lens maker's specs before you spend money on a plate.
One habit matters more than any plate. My first drop happened because I lifted the rig without locking the lens in, and it fell from shoulder height onto concrete. Before you lift your rig, check the connection. Every game, every time.
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Get the free guideBall head, straight into the monopod, or something else, like a gimbal? Is your lens foot already Arca-Swiss? And if you shoot the 180-600, what plate or foot do you use? Leave it in the comments on the video. I read all of them.
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