Hello everybody,
first at all, congratulations for this forum.
I've a F2 with DP-1, with three lenses (50 mm, 28 mm and 135 mm).
The problem is the measurement of DP-1. If I have a right read with 50 mm, there are a 2 or 3 stops of difference with the 135 mm. Same light, same conditions.
I've adjusted the DP-1 with trim screws and my Sekonic, changet batteries, but it remain the same.
Please, do you have any idea about the reason?
Thank you very much