GH4 with Speedbooster + Canon Glass, OR Leica 42.5 1.2 Im ready to make a purchase to get portrait length lens for my GH4. Currently I have one lens, the Leica 15mm 1.7, and a Nikon f mount adapter (non-speedbooster) Im looking to primarly shoot weddings, and fashion video shoots, so shallow DOF is important to me. Basicly im looking to recreate the look of shooting with a Canon 50-85 mm 1.2L on a 5dMark III... on my GH4. My dilemma is which route to take. The Leica 42.5 seems like an incredible lense that is excellent in low light, and has an incredible DOF, but purchasing the Metabones Speedbooster opens the door for the future, and allows me to have acess to so many other lenses, both modern and vintage. I also considered the lesser expensive voltieger 42.5 but the lack of OIS seems huge, especially because I periodically film action sports. The only reason I did not consider going the Nikon Speedbooster route is because It does not include image stabilization. Help! Im running myself in circles reading review after review. On a side note, I have found the Leica 42.5 1.2 on eBay new for around $1,200.00 for a "Japan model". Is that to be avoided?