Eyepiece Sizes & Fitment


Our adapters are designed to work with a wide variety of spotting scopes, binoculars, telescopes and other optical devices. Measure your eyepiece and verify that it fits these size requirements. If your eyepiece has a diameter of less than 39mm, order our Small Compression Ring Set

Please contact us know if your eyepiece is a different size. We may be able to create an inexpensive custom insert for your eyepiece, and we’re also continually looking to expand the range of devices our adapters work with.