Thanks!
you're right, that is not a "holiday rig" but definitely usable
total weight of 4/3 to FD+Canon+redclamp+Möller+Focuser8 is 950g, so similar or less than Sigma 18-35+speedbooser
Sorry, I haven't seen so much flare, this my first test and can't compare with other lens. I have to test more, in direct sunlight...