I had an M 35-70 f/2.8-3.5 for a while. Huge and heavy for its zoom range.
True as most of us use f3.5 or f4 zoom in this range. But what I meant was that for a f2.8 zoom, it is small compared to the "competition". Canon equivalent zoom is way longer and more heavy. Olympus constant f3.6 has practically the same size. And now, comparing an apple with an orange... Tamron's new "tiny" 28-75mm marvel still has 20% more weight and lenght than Pentax M lens, although it starts at 28mm and is a constant 2.8.
Cheers,
Andre
