in my continuous Research of MFDBs one question I havent been able to answer is which of the current backs is best for long exposures. Im talking from 30sec to minutes.
I used the 5D for a project I was hired but noticed I lost considerable resolution and image quality when doing long exposures. The results werent bad, publishable, but I want better results since on close inspections the images need more detail and need to be cleaner. I will use it at night and twilight so clean skies are important.
I used film during long exposures ta night with great results but so far digital cameras have failed to deliver in that area. (I cant use MF or LF film anymore since there are no quality developers left locally anymore, i live on an island)