Microbial mats on the Emerald Terrace at Orakei Korako, The Hidden Valley. Aperture: ƒ/4.3 Camera: PENTAX Optio S45 Taken: 18 December, 2005 Focal length: 5.8mm ISO: 50 Share this:EmailFacebookTwitterPinterestMorePrintRedditLike this:Like Loading... Related