ok folks can you help me here lol? i have found a sonnar 180 ziess jena ddr mc at the goodwill , seems to be in very nice condition for 76.00 , i was at first thinking i would love to use it on a a cannon eos system but first my cannon is not full frame , and honestly i am not found of telephoto lens more like wides for for me on 35mm cameras but it dawned on me that it is possible to use this on my rb67 , is it ? they say you can use a adapter but lord it has been a hour of searching even on ebay with no luck , is this true , and if so can any one point me in the right direction. were can i search for this odd ball ? second what am i bargaining for i am simply in love with the 190 older non c lens for this camera , so is this adapter going to cost me hundreds more but show no better results ? is the 180 ziess lens different , better sharper etc than the one i have ? it is a heavy lens but so are many rb67 lens and i use the tripod in a studio with this camera so nope i am not going to go out and find a adapter for the cannon , i am still in the process of trying to find one for a super takumar 55 for that camera whats your thoughts is it a good lens ? , i believe it is a pentagon lens mount but not sure , for i know it is not a pentax screw mount . ok ,it doesn't have shutter in it so i don't want to go out and find a way to use it on the 4x5 linhoff master L what should i do with it if it doesn't fit or adapt to a rb67 , is there a body it does fit ??