[LargeFormat] symmar

[Eduardo Aigner]

Hi there,

I am new to the large format world and to this list.
Last week I purchased a Toyo 45C and a Schneider Symmar 240mm 1:5,6 wich is
said to be a convertible lens (?). On the shutter is marked, beyond the
240..., 420mm 1:12 in green letter. The diafragm scale is double too, with
green and white diferent f stops. Is this functional? Is the coverage large
enough for 4x5? How should I deal with focus shift if any??

thanks

AIGNER