These multi-coated 1.25"/31.7mm format eyepieces provide a generous 20mm eye relief and all focal lengths - including the 2mm model - feature particularly wide diameter eye lenses for maximum viewing comfort. These eyepieces are especially valuable for spectacle wearers, as the long eye relief allows the entire field to be viewed whilst spectacles are being worn. Soft rubber eyecups are provided for added comfort and to keep out extraneous light.