Im thinking of buying a 55-200vr to match my 18-55.The problem is,would it be a hard task changing lens when you are shooting halfway.Like when you do street or landscape and you are in the public and there's no proper table for you to change lens is it difficult?For say dropping your lens scratch glass or so on.If possible please tell me the procedure you take changing lens.I know you have to face your camera down to change lens and putting the rear cover of the lens as fast as you can