So I took my Halloween night to shoot some f/1.2 Rectilux footage with Canon's 50 and 85mm. I really liked how it turned out, even though I fucked up alignment in some several shots. Also pictures of the rig there. (: http://www.tferradans.com/blog/?p=8292
In Nick's post, he said his (slightly different) modification could focus to about 40 feet, later in that thread John Barlow said he fixed this using a cemented 2-element negative achromat (BTW, if anyone knows which achromat he's talking about, please let us know). Earlier in this thread Rich posted an screencap @ infinity with his helicoid mod, it seemed fine. I measured the focus travel distance of the unmodded B&H...the front element moves approximately 4mm when you focus from closest to farthest. The helicoid has a travel distance of approximately 14mm, so there's a lot more play with the modded focus. Based on this & Rich's test photo, my guess is yes, the modded version of the B&H should be able to focus to infinity. Once my mod is done I will test & confirm.