7. — The Rule Of Five Hundred

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Example: For a 24mm lens on a Nikon crop sensor (1.5x), the effective focal length is 36mm ( ). The rule would be 7. The Rule of Five Hundred

It identifies the threshold where the movement of stars across the sky begins to blur into streaks rather than appearing as distinct dots in a long-exposure image. 2. Application and Adjustments The phrase gained mainstream recognition as the title

Shutter Speed (seconds)=500Focal Length of the LensShutter Speed (seconds) equals the fraction with numerator 500 and denominator Focal Length of the Lens end-fraction 7. The Rule of Five Hundred

While the basic rule applies to , modern digital sensors often require adjustments based on their specific hardware: