What is 100 400mm on micro four thirds in full frame?

100-400mm on Micro Four Thirds gives the view of 200-800mm on full frame.

The same view on every common format:

• Medium format (44 x 33): 253-1013mm
• Full frame: 200-800mm
• APS-C: 133-533mm
• APS-C (Canon): 125-500mm
• Micro Four Thirds (yours): 100-400mm
• 1-inch: 74-296mm
• 1/1.3-inch: 56-222mm
• 1/1.7-inch: 43-174mm
• 1/2.3-inch: 36-143mm

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.