I am going to buy a NEX 6 to try or to replace my EPL5, mostly use MF lenses - which soviet lenses do you recommend to buy? need something around 28mm, 50mm and 100 -150mm I got Industar 69 Industar 26m 50mm http://allphotolenses.com/lenses/item/c_413.html - is M39 mount more preferable because a smaller adapter (then m42)? -what do you think about Industar-50 50 mm f/ 3.5 Industar-50 50 mm f/ 3.5 http://allphotolenses.com/lenses/item/c_2183.html http://allphotolenses.com/lenses/item/c_1296.html like the small size, is any problem with using these lenses on NEX? - is there a dedicated "Zoom In" button on NEX body for easier focusing (like on Olympus)? I mostly shoot abstract, nature, urban etc: https://www.flickr.com/photos/eugene232 thanks!