one of my best tele's compare to the 135L the 135 bokeh is more buttery due to its 2/f but the 100mm rocks tops in its class of 2.8 and for macro its nothing but sharp all the way. one of the sharpest macro L glass out there. im happy to own this gem.
its only software, so i will ignore this like everything new until its finalized there we can say for sure, but the pic at the bend its very low to the bottom where a 4 will fit in perfectly. Either way its a new product and im happy to see canon doing some updating.