If I read your post correctly you did one of the options I was considering - put the "middle" part of the progressive lens as the "distance" part. That way the gap between distance and bifocal essentially goes away. I'm debating whether it's worth giving up the distance spotting of hammerheads etc (beyond normal video/photo range anyway) in favor of getting rid of the out-of-focus part of the near distance. Oh, well, all life is some sort of compromise...
I even thought about having two masks with me for that reason: clip off the distance mask and switch if I decided it was better at a given moment. Just what I need; something else to hang off my BC!
Thank you Walmyr; I sent them an inquiry. Their masks presently seem to be limited to 100' with a deeper capability coming in "early 2014." So we'll see if I'm going to be a pioneer... (you know, the guy with all the arrows in his back - grin)
I tried to edit my original post but couldn't figure out how.
ScubaBob is 100% correct: the thread size on the L&M filters for the Sola 4000 is 37mm, not 35mm as I originally stated.
I'll hunt some more, and test the concept underwater when I can!
EDIT: Just ordered two of the B+W 37mm #25 Red (090) MRC filters from B&H @ $30US each. They say 6-8 weeks delivery - I hope they are overestimating...
EDIT #2: Just a thought - if I locate and set up on a subject using the red filters there may be a possibility that the the camera's white balance won't give enough correction - I'll need to try it to find out. Here's another thought: if the red filter is too red, the filter holders rotate on the Solas, so I could rotate them out of the way with the camera running. That way I might get some few seconds or so of usable video - after I previously white balanced with the unfiltered lights, of course. Still trying to think of more ways to complicate my fun!