What is 14mm f2 5 on micro four thirds in full frame?

14mm on Micro Four Thirds gives the view of 28mm on full frame. For the same depth of field, f/2.5 there behaves like about f/5 on full frame. Exposure doesn't change: f/2.5 gives the same brightness on any sensor.

The same view on every common format:

• Medium format (44 x 33): 35mm at about f/6.3 for the same depth of field
• Full frame: 28mm at about f/5 for the same depth of field
• APS-C: 19mm at about f/3.3 for the same depth of field
• APS-C (Canon): 18mm at about f/3.1 for the same depth of field
• Micro Four Thirds (yours): 14mm at about f/2.5 for the same depth of field
• 1-inch: 10mm at about f/1.9 for the same depth of field
• 1/1.3-inch: 7.8mm at about f/1.4 for the same depth of field
• 1/1.7-inch: 6.1mm at about f/1.1 for the same depth of field
• 1/2.3-inch: 5mm at about f/0.9 for the same depth of field

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.