Of course I won't use this lens just for steadicam work, but I really need a fantastic prime for filmmaking (in the range of 20mm), especially to fly with the UM4.6k and a glidecam. I was considering the SLR Magic APO Hyperprime 25mm with the EF-mount modification but might just be a tad too expensive. I also thought of the Leica-R primes which I always wanted to own. 2000eur would be my max. I favor optical quality (cinematic color rendering, no CA and distortions) much more than build quality (though at this price most lenses are well built).
Thanks and Merry Xmas to everyone!