What is 50mm on the olympus om d e m1x in full frame?

50mm on the Olympus OM-D E-M1X (Micro Four Thirds) gives the view of 100mm on full frame.

The same view on every common format:

• Medium format (44 x 33): 127mm
• Full frame: 100mm
• APS-C: 67mm
• APS-C (Canon): 62mm
• Micro Four Thirds (yours): 50mm
• 1-inch: 37mm
• 1/1.3-inch: 28mm
• 1/1.7-inch: 22mm
• 1/2.3-inch: 18mm

Crop factors are by the sensor diagonal, rounded as they're usually quoted; a format with a different shape (4:3 against 3:2) frames a little differently across the width. More in the focal length converter.

Computed from the sensor sizes, not written by a model.