Hi, long time casual browser, first time question asker.
I was wondering, when shooting film (in this case, regular 16) with a lens that has a view finder attached (in this case, a Som Berthiot 17.5-70) ... is there some type of optical prism in the lens to allow this viewfinder to work and does it effect your exposure measurement / setting? Surely it's robbing a bit of light as it passes by?
Sorry if this has been discussed already on this forum but couldn't find a thread with the same question. Excuse me if I've doubled up.
Thanks for your help