Hi all, I was wondering how I can use a modern Canon ETTL macro flash (the MT-24 EX Twinlight) with a macro lens (I have a Nikon 135mm macro lens for my view camera). This is a very versatile flash that can be easily positioned to illuminate a 4x5" subject for 1:1 shots. The ring flash will fit on the 4x5 lens. I also have a cord that will allow this kind of lens to trigger the flash. The problem is that I haven't a bloody clue how to estimate or calculate exposure with an ETTL flash, and unlike my DSLR my view camera isn't going to tell the flash what to do. Any ideas?