[Brightcolours]

   Errrr.....I don't know these!.......like...... how about them.....  pray tell?

The sensors used by Nikon (and others) don't always have the same size, and more often than not are not exactly 1.5x crop.

Take the Nikons D40/50/60/70, for example, had a 23.7mm sensor width, so 1.519x crop factor. This is the biggest size by the way, so it should really be called 1.52x crop.

The D500 has a 23.5mm sensor width, so 1.532x crop factor. The Nikon D3200's sensor has 23.2mm width, 1.552x crop. The D3100, with 23.1mm sensor width, 1.558x crop.

 

My EOS M has a sensor width of 22.3mm, which makes it 1.614x crop. My EOS 6D has a 35.8mm sensor width, making it a 1.0056x crop.