I have a pair of 2.8E Rolleiflexes. Yes, they're heavier than a 3.5 or a Rolleicord. I love them though. The interlock between aperture and shutter can be turned on or off rather easily (although it takes a little practice at first). The lenses are of course the primary reason for getting these and even though they don't have the 10-blade aperture of the early (A,B, and C) models, the bokeh/OOFAs is still very nice.