>>3066773Do you know what cropping is? The whole just actually chopping the outer edges of the image off?
That's all that is happening. With a crop sensor and a full frame lens, the lens is casting a larger image circle than the sensor's physical size, so the sensor isn't even there along the edges to record it, so you're cropping those edges of the image circle.
In the case of a dx lens on a full frame sensor, the image circle itself is smaller than the sensor, so you're cropping in that you have parts of the sensor that are getting no information to record. (see pic).
...god I hate the whole equivalent/effective focal length crap. It leads to such fucked up ideas regarding focal length.
