I think the first F is the f-stop of the lens. So the lens has a 2.0 to 2.54 F-stop.
The second is the magnification factor. So it can be anywhere from .89 magnification (smaller than a normal lens) to 1.09 (magnified a little).
But of course I may be wrong.
Reedl
The second is the magnification factor. So it can be anywhere from .89 magnification (smaller than a normal lens) to 1.09 (magnified a little).
But of course I may be wrong.
Reedl