If you want to guarantee you don't have separation issues, get one of the brand new Rollei FT models. The brand new ones have an additional benefit of minimum focus of 4 feet (1.3m), whereas the originals have a minimum focus of 8 feet (2.6m). The downside to the new ones is that they're around $5K USD. Originals can be found with patience for around $1500 USD-$2000 USD. Simple inspection will show you lenses on original cameras that do or do not have separation.