Your idea of "not much larger" is certainly a bit different than mine, Peter. You might want to double check the figures over at Boz's site.
I've had both lenses at the same time, and the A*300 is seemed quite a bit bigger than the K135/2.5 ... As for its "greatness," well, we'll just have to disagree there as well. I had two, and was not satisfied with either. Shel > [Original Message] > From: P. J. Alling > > I use the A*300 f4 it's a great lens, but it has a very long focus > throw, (you can't expect to change from closest focus to infinity > quickly), and it's closest focus is none to close, about 13 feet. On > the other hand it's not a lot larger than the smc P 135mm f2.5 with the > lens hood mounted and not a lot heavier.
