Kenko Star Cluster Glasses

Kenko Star Cluster Glasses Reduce selected urban light. See a less orange night sky. Spectral-control lenses, approximately 83% visible-light transmittance and ES extended-depth-of-field design support wide-field stargazing and meteor-shower viewing. 83% approximate visible-light transmittance 33 g approximate net weight 140 mm temple length Approximately 83% transmission The lenses retain high visible-light transmittance while applying their targeted spectral response. Approximately 33 g The lightweight frame reduces the physical burden during extended periods of sky scanning. Multi-coated lenses Kenko combines the spectral-control design with a multi-coating intended to support useful light transmission. Official transmission curve Reduce more yellow-orange light than blue light. Kenko's graph marks an approximate 10% reduction at 450 nm and an approximate 25% reduction at 590 nm. The targeted response reduces selected artificial light, including LED and high-pressure sodium sources, helping the sky appear less orange. Meteor-shower viewing The ES lens design keeps a broader range of distances in focus, reducing the need for precise refocusing while you watch a wide area of sky. Broad sky sweeps Extended depth of field supports scanning across the sky with less continual focus adjustment. Fit depends on your prescription frames. Designed for Over-glass use. The frame can sit over many prescription glasses. Worth knowing Not every frame shape will fit. Compatibility depends on the shape of your existing prescription glasses. Specifications. Optics Lens design ES lens with Extended Depth of Field Design Visible-light transmittance Approximately 83% Lens coating Multi-coated Lens dimension 65 mm Manufacturer lens classification Single-vision lenses for vision correction Frame Temple length 140 mm Frame material TR-90 Dimensions (W × H × D) 160 × 50 × 175 mm Physical and included Net weight Approximately 33 g Verified included accessory Semi-hard case × 1