Often when referring to your smartphone, it is said that "the best camera is the one you have with you". In other words, the camera on your smartphone, in your pocket, is better than the DSLR you've got sat on a shelf at home. Despite the rise of quality lenses and sensors, using a smartphone still isn't quite as good a 'proper' camera. There have always been compromises. At least, there have been until now.

Panasonic's CM1 may be thicker than your average phone, but it's easily pocketable, not too uncomfortable to hold and has an epic 20MP camera with 1-inch sensor, a 6-element Leica lens, manual controls and a maximum aperture of f/2.8. What does that mean for image quality?

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