It appears that my 7 yard mark will end up somewhere around the current 11 yard mark. The 8 yard around 12.5, etc. You cannot use the scope beyond the close yardages with the adaptor on. As soon.as you focus out, everything becomes blurred. So, the only area to be careful with are the close ones at say 10 to 11 yards. Those you can still see fairly clearly, so care will have to be taken to keep from ranging those wrong with the adaptor down.