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.
Review Link
 
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