What does 'cropping' mean in terms of sensors? Locked

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Charlie Spencer
Charlie Spencer Regular Member • Posts: 181
What does 'cropping' mean in terms of sensors?

In my pursuit of a new superzoom for birding, I've read plenty of comments comparing sensor sizes, focal length, and effective zoom. People often use the word 'crop' in a way I'm unfamiliar with.  I understand what it means in terms of post-processing.  It's cutting out the portion of the image you want to keep and discarding the area around it.  The resulting image is smaller but includes only the portion you're interested in.  At least, that's what I understand it to mean; maybe I wrong about that too.

But what does 'cropping' mean as far as deciding between sensor sizes, and selecting a camera for birds at long distances (150 feet or more)?   I'm from South Carolina so feel free to use small words.

Thanks.

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