Revision as of 09:27, 19 March 2008 (edit) Awcam (talk \| contribs) (created page)		Revision as of 10:47, 19 March 2008 (edit) (undo) Awcam (talk \| contribs) (added temporary image, to check that .png files work) Newer edit →
{{WIP}} A '''Pentaprism''' is a five-sided optical glass element that reflects light through 90°. A variant, the ''roof ~~pentapism~~pentaprism'' has an two sloping sides at the top to allow light from the mirror of an [[SLR]] to be reflected into an eye-level [[Reflex finder\|(reflex) viewfinder]], with the picture appearing the correct way around to the photographer. This avoids the problem suffered by other reflex viewfinder systems, which can have the image laterally (left-right) reversed, making following a moving subject difficult or confusing. The roof pentaprism is the reason for most SLR cameras having a triangular top to their viewfinders. {{Flickr_image \|image_source= http://www.flickr.com/photos/24225011@N04/2344518827/ \|image= http://farm3.static.flickr.com/2371/2344518827_c8578e4393.jpg \|image_align= right \|image_text= Light from the subject goes through the lens, is reflected from the mirror, then is flipped through the pentaprism, through the eyepiece lens to the eye. }} === Links === * [http://www.ted.photographer.org.uk/camera_types.htm Viewfinder Types] on [http://www.ted.photographer.org.uk/ Ted's Photographics] by Ted Ellis

Pentaprism: Difference between revisions

Pentaprism (edit)