Bessa R total RF FOV?

[piero2025]

What would be the total (widest) FOV of the Bessa R finder? Meaning, having mounted a wide angle lens, what would be the lens that corresponds most to the outer edges of the finder, beyond the lines for 35mm? A 28mm or a 25mm or..?

 

[mpaniagua]

I used a 28 (Summarit 28 f/2.8) on a R2 and I find the coverage to be very acceptable. I think a 25mm would be a strech.

Marcelo