Freeze Indoors
Here's where ISO earns its keep. Indoors there's rarely enough light for a fast shutter speed, so moving subjects come out blurred — even though they'd freeze easily outside. The fix isn't more light; it's more sensitivity.
Raise the ISO and you give the camera room to pick a faster shutter while keeping the photo bright. Suddenly that wriggling pet or sprinting toddler snaps into focus indoors, no flash required.
This is the exposure triangle working as a team: ISO buys the shutter speed that freezes the motion. You're trading a little grain for a sharp moment you'd otherwise have missed — almost always a trade worth making.
Shutter Priority at a fast speed (1/250s or faster) with Auto ISO on — the camera raises ISO to keep the shot bright. Or raise ISO yourself (1600–6400) until the motion freezes. Flash off.
It counts when an indoor moving subject comes out sharp and frozen — no flash — even if there's visible grain. Still blurry? You need a faster shutter, which means letting the ISO climb higher.
The assignment
Indoors and without flash, photograph something moving — a pet, a kid, someone cooking — sharp and frozen, by raising ISO enough to allow a fast shutter.
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With a free account your shot lives on this assignment — you earn the XP, your streak grows, and the next technique opens.
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