Today I am writing about a special comparison, that is the depth of field of a crop sensor camera and a full frame sensor camera for a special case where the aperture, focal length and focal length are the same.


What do you think. My answer is yes there is no significant difference for the photos taken in each case. But

When comparing the depth of field of a full frame camera and a crop sensor camera with the same aperture, focal length, and focus distance, the depth of field of the crop sensor camera will be shallower than the depth of field of the full frame camera.

This is because the crop factor of the crop sensor camera affects the effective focal length of the lens and, therefore, the depth of field. The crop factor is a measure of how much the field of view of the lens is cropped compared to a full frame camera.

For example, if a lens has a 50mm focal length on a full frame camera, and it is used on a crop sensor camera with a crop factor of 1.5x, the effective focal length of the lens becomes 75mm (50mm x 1.5). This results in a shallower depth of field, because a longer focal length lens has a shallower depth of field compared to a shorter focal length lens.

So, when comparing the depth of field of a full frame camera and a crop sensor camera with the same aperture, focal length, and focus distance, the crop sensor camera will have a shallower depth of field due to its crop factor.