The CEMAX (Contrast Enhanced) series eyepieces are specially designed and coated for optimising H-alpha viewing. " In the construction of Solar filters and associated instrumentation, Coronado takes enormous care to optimise contrast by minimising the number of components and designing them so that they do not result in creating residual reflections and spurious light near the image. Until now, the only component not included in this overall approach was the eyepiece. Now the new CEMAX SERIES fills this need. Specifically designed for use at H-alpha and multi coated on every surface (including cemented surfaces) , the CEMAX eyepieces are the ultimate in contrast enhancement for the Solar observer. 20mm eye relief.Apparent FOV52 degrees. The CEMAX SERIES are currently available in focal lengths of 25, 18 and 12 mm. A fully complimentary and similarly optimsed, X2 Barlow lens is also available for increasing the magnification options.