Hydra Basics

Basics of Hydra, by Creaceed: http://www.creaceed.com/hydra/screencasts_user_guides.html No MacMagazine: http://macmagazine.uol.com.br/2009/05/31/resenha-hydra-cria-imagens-hdr-em-aplicativo-para-o-mac-os-x-ou-plugin-para-o-aperture/