The show-stopping Robtics Nirvana 2 inch 28mm ultra wide angle eyepiece is a heavyweight in more ways than one and will certainly draw attention from fellow observers!! Offers an incredible jaw-dropping viewing experience to rival some of the leading premium eyepieces on the market, but at an extremely competitive price. The huge 82 degree apparent field of view, superb field-edge correction and excellent contrast combine to provide a wonderfully immersive and memorable observational adventure. Works superbly in telescopes of all focal lengths. Constructed with 6 lens elements in 4 separate groups. This exotic eyepiece model features a large eye-lens element and soft twist-up rubber eyecup for comfortable viewing. Fully broadband multi-coated, features blackened lens edges, internal baffling and is parfocal. 18mm eye relief . Beautifully finished in high-gloss anodized aluminium with knurled rubber grips. Threaded to accept standard 2” filters. Weight approx 1000g.