Keywords: Fresnel lens Vellamo 2.JPG en Fresnel lens in the entrance hall of maritime centre Vellamo fi Merikeskus Vellamon sisääntuloaulassa oleva fresnel-linssi own MKFI 2011-07-31 Lighthouse fresnel lenses Maritime Centre Vellamo Taken with Canon EOS 60D Taken with Canon EF-S 15-85mm F3 5-5 6 IS USM Files by User MKFI |