Watcher said:Wah really dreaming Take 2) for example. Sigma sells it at list price of US$1k, with aperture from 4.5-5.6, using 82mm (or 86mm, can't remember) filters.
Frankly, some of your "dreams" can only work in dreamland as it seems to break certain law of physics... :bsmilie:
Hi I think you misunderstood.
Digital lens made from scratch like 4/3 actually can create the aperture and yet produce smaller lens, lighter because it is not full frame. So, the law of sizes due to focal length ratio to aperture may not hold here.