Crop Factor with ISO & Aperture

There are a lot of myths out there about how the size of your sensor affects the field-of-view of your lens (sometimes incorrectly stated as focal length multipliers), the effective aperture (from a depth of field perspective) and the ISO. I knew about the first two but wasn’t aware about the ISO.

The following video by Tony Northrup is one of the best explanations about all of these things. This is doing the rounds at a few of the various rumour sites but is well worth just over half an hour of your time:

Note: I will now be pronounced ISO like “eye-so” instead of I.S.O. – watch the video 🙂


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