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Lecture 15: Cameras & Lenses (16)
Sicheng-Pan

I'm wondering what is crop factor here, and how is it related to other parameters given here.

CharlesLiu02

According to this website, https://photographylife.com/what-is-crop-factor, "Crop factor is the ratio of the sensor size to 35mm / full-frame. You take the provided crop factor number, multiply it with the focal length of the lens and you get the equivalent focal length relative to 35mm film / full-frame."

prannaypradeep999

Adding on to that, larger crop factors in cameras have several effects on the resulting images, including a narrower field of view, increased magnification, increased depth of field, and often increased noise due to smaller sensor sizes.

geos98

Adding to @prannaypradeep999, I think that is why phone camera lens are often super wide-angle. Because only this way, the phone camera would have a reasonable 35mm equivalent focal length

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