I have been reasearching other lens options and i found the Jupiter 37a to be a good lens for me. I want something that will allow the photo to come to me so i can shoot birds. Will the lens do the job. I was wondering how I can obtain it cheaply in Canada. What kind of stores sell them. I was considering ebay buy shipping is to much for how much money i have. So what stores can sell these in good condition that work?