I disagree that a Mamiya TLR is not as good off the tripod. I always found that supported by your hands from underneath and by the strap around your neck, it is extremely stable to handhold. I have found that I can shoot handheld at much slower speeds, especially without the slap of that great big mirror. If you want to shoot more eye level, there are a variety of prisms available. I agree that under most normal shooting circumstances, parralax isn't a problem.