Sensors and Exposure
Understanding how sensors work and their real-world limitations are key to achieving high-quality images.
Sensors, exposure, and calibration are inextricably linked. It is impossible to explain one of these without referencing the others. Electronic sensors are the enabler for modern astrophotography and without them it would be a very different hobby. Putting the fancy optics and mounts to one side for a moment, it is a full understanding of the sensor and how it works (or not) that shapes every imaging session. We know that astrophotographers take many exposures but two key questions remain, how many and for how long? Unlike conventional photography, the answer is not a simple meter reading. Each individual session ...
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