Three dimensional printer maker 3D Systems (DDD) is well off its lows of the day after the company provided fiscal 2013 earnings per share guidance that may have confused some investors. 3D Systems executed a three-for-two stock split on Friday. If the stock had not split, the company said that its fiscal 2013 EPS guidance would have been $1.50-$1.73, versus analysts' consensus estimate of $1.58. If the split is factored in, however, the company fiscal 2013's EPS guidance was $1.00-$1.15. Some investors may have compared the company's post-split guidance to the pre-split consensus estimate. As a result, they may have erroneously believed that the guidance was much lower than expected. In early afternoon trading, 3D Systems fell $2.25, or 6%, to $35.70. The stock reached a low of $30.28 this morning. Stratasys (SSYS), another three dimensional printer maker is also falling significantly, losing 4.5% to $64.30. Two other three dimensional printer makers, Ex One (XONE) and Proto Labs (PRLB), are little changed.