IIRC, the field of view is nearly 180 degrees. The fovea (area of greatest sharpness on the retina) is way off-center so that it is still engaged when looking ahead. I also recall reading that raptors have the equivalent of 20/4 vision, and it includes UV.
Rick http://photo.net/photos/RickW On Mon, Nov 7, 2016 at 11:09 AM, Malcolm Smith <[email protected]> wrote: > Paul Stenquist wrote: > > Another sparrow, shot at a modest 1/80th second shutter speed and an ISO of > about 1500. That seems to be a fast enough shutter to yield sharp results if > the bird is perching. This is with the DA 1.4X converter and the D FA > 150-450. The stop is f8 and the focal length is 630 mm. > > I always wonder what the bird’s field of vision is like. They must see more > than 180 degrees. > > http://photo.net/photodb/photo?photo_id=18308070&size=lg > ++++++++++++++++++++++++++++ > > They must have good vision around here, as the cat population is so high. > Great image, make the use of the warm weather whilst you can, the temperature > has dipped noticeably here. > > Malcolm > > > -- > 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. -- 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.
