I think everybody agrees 4x5 tends to take longer then smaller formats. Leading to less exposures being made. A comment I've seen is that even larger formats take even longer then 4x5. Is this true? If so why? Is it just the extra effort of moving the larger cameras? Or ? I'd think that the larger ground glass would make it easier to see what you're doing versus 4x5. Personally I think a 6x6 tlr is easier to visualize the final image over a 35mm and a 4x5 is easier then the tlr. Even with the world being upside down and backwards-))