β±οΈ Shutter Speed Calculator
Find the right shutter speed for any subject or motion effect.
How to Use This Calculator
Four tabs cover the most common shutter speed questions. Click a subject in "Freeze Motion" to see the recommended range. Use "Handheld / Reciprocal" to find the minimum safe shutter speed for handholding any lens. "Video 180Β° Rule" gives the correct shutter for any frame rate. "Star Trails" calculates the maximum exposure before stars start to streak.
On the Freeze Motion tab, click the subject closest to what you're shooting. The range shown gives you the minimum for sharp results (left value) to a conservative safe value (right value).
On Handheld / Reciprocal, enter your focal length and select how many stops of image stabilization your lens provides. The result is your minimum safe handheld shutter speed.
On Video 180Β° Rule, select your frame rate. The result is the shutter speed that gives natural-looking motion blur in video. Use an ND filter if this shutter is too slow for your lighting conditions.
On Star Trails, enter your full-frame equivalent focal length and choose the 500, 400, or 300 rule based on how sharp you want the stars. Lower number means sharper points but requires brighter skies or higher ISO.
Key Shutter Speed Formulas
The reciprocal rule says the minimum safe handheld shutter speed equals 1 divided by your effective focal length. On a 200mm lens with a 1.5 crop factor, that's 1/(300) so at least 1/300s. Image stabilization adds stops below this threshold. The 180-degree shutter rule comes from cinema: half the frame rate gives one shutter revolution per frame, producing the motion blur that looks most natural to human eyes. The 500 rule for astrophotography prevents Earth's rotation from trailing stars in a single exposure.
Real-World Examples
When You Need This
Sports and action photography constantly requires fast shutter speeds, and the specific threshold depends on the sport. A golfer at the top of their backswing is relatively slow; the club head through impact travels at 160 km/h and needs at least 1/2000s to freeze cleanly. Kids at a playground are somewhere in between. Use the subject guide to pick a safe starting point, then check your first few shots and adjust if you see motion blur where you don't want it.
For astrophotography, the star trails rule is essential before your first night shoot. At 24mm focal length in full-frame equivalent, you have about 20 seconds before stars become short dashes instead of sharp points. If your sky is dark enough and your camera is clean at ISO 3200, 20 seconds is plenty. But if you're in a light-polluted city and want to stack multiple short exposures, knowing this limit tells you your maximum single exposure length before you drive out at midnight.
Frequently Asked Questions
What shutter speed freezes motion?
To freeze motion: fast action/sports needs 1/1000sβ1/2000s+, running people need 1/500s, walking people/animals need 1/250s, birds in flight need 1/2000s, kids playing need 1/500s.
What is the reciprocal rule for handheld shooting?
The reciprocal rule states the minimum handheld shutter speed = 1/focal length. For a 50mm lens: minimum 1/50s. For 200mm: minimum 1/200s. With image stabilization, you can go 2β4 stops slower.
What is the 180-degree shutter rule for video?
For natural-looking motion blur in video, the shutter speed should be double the frame rate. At 24fps: 1/48s (use 1/50s). At 30fps: 1/60s. At 60fps: 1/120s.
How do I create motion blur for creative effect?
Use a slow shutter speed: waterfalls (1/4sβ2s), light trails (4sβ30s), star trails (30s+), panning moving subject (1/30sβ1/125s). Mount camera on tripod for stationary subjects.
What shutter speed do I need for milky way photography?
The 500 rule: maximum exposure = 500 Γ· focal length (FF equivalent). For 24mm FF: 500/24 β 20 seconds before stars start to trail. Use the 300 rule on a tripod for sharper results.