Depth of Field P.3

1. What is crop factor?
2. What is lens equivalency?
3. If you had a full frame sensor and your cousin had a APS-C sized sensor, how would you explain the differences between the camera's and lenses to your cousin?

Crop factor is defined by the amount zoomed in depending on the size of the sensor. For example, a smaller sensor will create a greater a crop factor, resulting in a more zoomed in image. In a standard 35mm camera, many photographers and videographers understand what a different focal length lenses look like. However, keeping the sensor size into consideration, lens equivalency can be calculated by multiplying the crop factor and the focal length. An APS-C sensor with a crop factor of 1.6, a 50mm focal length would be the equivalent to a 80mm on a 35mm aka full frame sensor. When you attempt to match the focal length to compensate for the crop factor, the bokeh in the background changes. This is because the crop factor is not only multiplied to the focal length, but it is also multiplied by the F-stop number. when the F-stop is adjusted to create a similar bokeh in the background, the ISO must be multiplied by the crop factor^2 as well. As a result, smaller sensors shoot the equivalent of a higher focal length and aperture, resulting in a deeper depth of field.