camera data to max

Hello:)
I have got question. I am trying to export Camera from blender to 3ds max.
Collada isn’t working as it should do(In my opinion).

When I am exporting perspective camera there is no problem( lens value and sensor value can be easly calculated to FOV).

I have problem when I am trying to export orthographic camera

In Blender in render from orthographic camera depends on ortho_scale.
In Max there is no that value.
Everything depends on FOV value.

I was trying to compare that value.
Blender ortho_scale=4 looks similar to Max Fov 2.25
It doesn’t look ideal. Furthermore I think it is not linear function.

Maybe someone tried to do something similar?