Nikon D810A shot of a nebuale

Shutter speed represents the amount of time the shutter is open to receive photons onto the sensor. As a rule of the thumb, you need a long shutter speed in astrophotography. Constellation shots generally run from 10 to 30 seconds. Capturing wide fields can last about 5 to 10 minutes, while shot taken when focusing through a telescope might run about 30 to 90 minutes.

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