When adapting the lens of one camera system to another, you may not always get the same results. Part of the reason is that your camera system may have a smaller sized sensor than the system the lens was made for. This will lead to an image that appears ‘cropped’ compared to an image taken with the same lens on a camera with a larger sensor. We’re speaking of the so-called ‘crop factor’, which determines the difference between the appearance of images taken with cameras with different sensor sizes, but the same lens. After the break, we’ll go into detail how the crop factor is calculated, and how it relates to a lens’ focal length and other properties.
by FELIX ESSER