Hasselblad X1D medium-format vs. Nikon full-frame relative sensor sizes. Dividing the Nikon sensor diagonal by the Hasselblad diagonal gives a crop-factor of 0.79. Take that, you mirror hugging DSLR apologists.
(c) copyright chrisbonney.uk 2017. Crop-factor comparison of Nikon full-frame and Hasselblad medium-format sensors.