Have you ever wanted to try a 2.5X Barlow lens but didn't want to invest a great deal of money on an accessory you may or may not use? Then consider the TPO 2.5X APO Barlow Lens. It will product 2.5x the magnifying power of all your 1.25-inch eyepieces! This fully multi-coated Barlow lens, offers you the opportunity to see if a high powered Barlow lens is right for you.... and the three element, apochromatic optical glass is a bonus! This economically-priced 2.5x Barlow lens makes a wonderful addition to your telescope accessories and increases the usefulness of the eyepieces in your collection. Great for the beginner or for those who only occasionally use a Barlow lens! Superb performance on lunar or planetary viewing and for coaxing high powers out of short focal length telescopes, like many of today's fast refractors.