Meade #671 Wide-Field Adapter System (WFAS) for visual or CCD use only. Unit consists of Special WFAS T-Adapter, Telecompressor Lens, and #919 Diagonal Prism. Reduces the effective focal ratio of f/10 SCT scopes to f/5, yielding twice the visual field of view, 4 times the image brightness, and one half the normal magnification. In like new condition. Costs $125.00. Will sell for $60.00 plus shipping.