1. What is the Shutter Speed Rule?

The shutter speed rule helps photographers avoid camera shake by recommending a minimum shutter speed based on the lens's focal length. This is especially important for handheld photography.

2. How Does the Calculator Work?

The calculator uses the shutter speed rule:

Where:

• Focal Length — The lens focal length in millimeters

Explanation: The rule suggests that your shutter speed should be at least the reciprocal of twice your focal length to minimize camera shake when shooting handheld.

3. Importance of Shutter Speed Calculation

Details: Using the correct shutter speed prevents motion blur in your photos caused by camera movement. This is particularly critical when using telephoto lenses.

4. Using the Calculator

Tips: Enter your lens's focal length in millimeters. The calculator will suggest the slowest shutter speed you should use when shooting handheld.

5. Frequently Asked Questions (FAQ)

Q1: Is this rule absolute?
A: No, it's a guideline. Some photographers can handhold at slower speeds with good technique, while others might need faster speeds.

Q2: Does this apply to image stabilization systems?
A: Image stabilization allows for slower shutter speeds, but this calculator provides a good starting point without stabilization.

Q3: What about crop sensor cameras?
A: Use the actual focal length of the lens, not the equivalent focal length, as camera shake relates to the physical lens properties.

Q4: When can I ignore this rule?
A: When using a tripod or when you intentionally want motion blur for creative effects.

Q5: Why twice the focal length?
A: The factor of 2 provides an extra safety margin to account for different shooting conditions and photographer technique.