Balance the Triangle
Here's where Manual earns its keep. Now that you can land a correct exposure, you choose which setting leads — and that choice is the photograph.
Decide your priority first. Want a soft, blurred background? Open the aperture wide (a low f-number) and commit to it. Want to freeze a moving subject? Set a fast shutter and commit to that. Then balance the rest: changing your lead setting pushes the meter off 0, so you bring it back by trading the other two. Open the aperture (more light) and you'll need a faster shutter (less light) to stay level — that's the exposure triangle working in your hands.
Reach for ISO last. It's the rescue when aperture and shutter alone can't balance the exposure — but it costs a little grain, so leave it as low as the light allows. Lead with your creative choice; let the other two serve it.
Manual mode (M). Pick your lead and set it first: a wide aperture (try f/2.8) for a soft background, OR a fast shutter (try 1/1000s) to freeze motion. Then adjust the other two — the remaining dial, and ISO only if needed — until the meter reads 0.
Your creative choice landed — the background is genuinely soft, or the motion is frozen sharp — AND the exposure is right, because you balanced the other two settings to compensate. If it came out too bright or dark, trade one of the supporting settings rather than abandoning your lead.
The assignment
In Manual, make one deliberate creative choice — a blurred background or frozen motion — then balance the other two settings to keep the exposure correct.
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