Rule of 500 Calculator – Astrophotography

The Rule of 500 Calculator in Excel is a simple document to let you quickly determine the maximum shutter speed for shooting Astrophotography. For example, if you are shooting with a 25mm lens, your maximum shutter speed would be 20 seconds. Download the demonstration file below.

For information on shooting astrophotography, watch the video below from Mike Smith. Mike does an excellent job explaining how to setup a Sony A7iii.

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AverageIFS Function

Finding the arithmetic mean in Excel is very easy.  In this example, we will be using the AVERAGEIFS function. We

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