Amazing planet,lunar and deepsky views. See the review comparing this top shelf eyepiece with the best! Like our D21s, the D14s are measured and matched to 1/100th optical focal length and labeled as such. Typically 15.2mm or so.
Specifications: Available Focal Lengths: 21mm & 14mm 1.25" Eyepiece Barrel format 65 degree AFOV Fully Multi-Coated on all air to glass optical surfaces for ultra-high-efficiency transmission High Index Japanese Glass utilized 20mm Eye-relief Black anodized aluminum housings and barrels with rubber knurl Laser engraved logo Rotating batwing Eye-Guards Weight: D21s: 8 oz each D14s:9 oz each Full one-year warranty