Take a look to this image:
It has the numbers I would expect. If the distance from the point of view to the lens goes larger (50 is the max in the image above) the fied of view reduces to 5 degrees. If the point of view nears the lens (1.78mm is the min) the field of view wides to 130 degrees.
Now: In blender we have a field of view of 14 degrees that are 130 mm. A field of view of 50degrees is 34mm.
In the above image 14 degrees would be something like 20mm and 50 degrees would be like 5mm
So: why are blender camera mm like 6x of what you see in the above image? Is blender camera correct or wrong?