Hello, I know you must all be very tired of this kind of question, but alas, I didn't manage to find the answers myself.. I am a hobby photorgrapher, dabbling nowadays mostly with large format, but due to the amount of time spend outdoors with very small children I seem to need something more portable that I would be able to set up quickly - and that would mean MF. I have a couple of TLR's, use the Rolleicord Va quite often - it's fine for some quick snapshots but given the rather dim focusing screen and certain handling inconveniences I've begun to think about an SLR. Here are my criteria - Format - as a matter of fact I am open to anything from 6x4,5 to 6x7 (or 6x9), though I slightly prefer the square. And if going the SLR route I would like to have exchangeable backs - so no Pentax 6x7. I would like to be able to focus rather closely - closer than with the 'cord (even though I have the Rolleinar I, i would prefer even closer) - that led me to Mamiya RB and it's bellows (I could live with the weight and that it would be almost bound to the tripod), but I would like to have convenient bulb setting (for night-ish photography - when the kids are asleep ) - and I got it from reading some threads that the RB doesn't have a true B setting... Does the mamiya 645 have one? I gather Bronicas do... Or am I wrong? I prefer waist level finder but the possibility of a prism (for the night) would be nice.. So if not the RB which system have a fine and reasonably priced macro lens (which could be an all-rounder as well)? And as for other lenses - for the moment I'd be content with an all-rounder standart lenght and a wide perhaps - I do mostly landscape and details-in-the-landscape sort of stuff, not much of portraiture or other... PS: I've forgotten about financial matters, but you might have guessed, that price is a BIG issue (meaning it ought to be small), so no 'blads or SL66s.. Alas..) I hope I didn't muggle it too much... Thank you all! a.