Lambda Research Corporation has released version 6.5 of its Oslo lens design software. The Oslo 6.5 update includes 12 program enhancements and improvements to the 6.4 release. The version is both Windows System 7 and Vista compatible. Program improvements include an updated Zemax and CodeV translator, updated Forbes asphere surface type, and a new tabulated surface type (for the creation of faceted Fresnel lenses etc.). This release also includes updated glass and vendor lens catalogues.