I received the 2X Barlow with 2 chips on the lens and some glue residue showing around the perimeter. I didn't even try it to check the optical quality, just packed it up and sent it back. Orion was very prompt in issuing a refund. Looking at it, it just looked like cheap construction for something costing $93. However, I was happy with the prompt refund through Amazon, although in the end it cost me to ship a defective product back. Now, I am reluctant to buy any eyepieces or Barlows from Orion, although I am still considering an Orion telescope.