This Celestron Barlow lens increases the magnification of any 1.25 or 2 inch eyepiece by 2.5x, & makes a useful addition to your astro inventory. The 4-element multi-coated apochromatic optics are tuned to produce a flat field of view without light loss or false colour, & the lens is threaded to accept 2 inch filters. The finish is excellent & practical: A hard-anodised aluminium housing with rubber grip & practically-sized thumb-screws
- easy to operate, even with cold fingers or while wearing gloves.