What is 19 35mm on medium format in full frame?

19-35mm on medium format gives the view of 15-28mm on full frame.

The same view on every common format:

• Medium format (44 x 33) (yours): 19-35mm
• Full frame: 15-28mm
• APS-C: 10-18mm
• APS-C (Canon): 9.4-17mm
• Micro Four Thirds: 7.5-14mm
• 1-inch: 5.6-10mm
• 1/1.3-inch: 4.2-7.7mm
• 1/1.7-inch: 3.3-6mm
• 1/2.3-inch: 2.7-4.9mm

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.