I've never owned a wide angle lens before, (never needed one) and suddenly I'm doing a TON of group shots and was told by a friend it might be helpful to invest in one! But I've searched high and low on google, bing, etc etc on some feedback for schematics on them and can't find the information I need!! My studio is 16ft wide and I need to know how far back I need to be from the subject I should be to be able to fit them in from wall to wall and which lens would be appropriate for this without warping the photograph (the "fisheye" effect is what I'm trying to avoid) any tips?? Thanks!!