On Thu, Jul 18, 2013 at 01:00:41PM -0600, steve harley wrote: > on 2013-07-18 1:36 Larry Colen wrote > >This is probably the clearest: > >http://www.flickr.com/photos/ellarsee/9310682903/in/set-72157634684347823 > > gorgeous owlet > > i wonder what ISO its eyes go up to
Ours are about 100,000. I don't know if theirs are much more sensitive. This page looks promising: http://www.owlpages.info/forum/viewtopic.php?t=1300&postdays=0&postorder=asc&highlight=blue+rods+eyes&start=15 Looking for aperture, the human eye seems to vary from about f/2.1 to f/8.3 http://en.wikipedia.org/wiki/Apertures It seems as if owls have about f/1.3 http://books.google.com/books?id=f5TVp1otVWYC&pg=PA52&dq=aperture++%22owl+eye%22+f/stop&hl=en&sa=X&ei=MkHoUazBL4TI9QT0zYDACw&ved=0CC8Q6AEwAA#v=onepage&q=aperture%20%20%22owl%20eye%22%20f%2Fstop&f=false > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Larry Colen [email protected] http://red4est.com/lrc -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
