Kiwi Posted June 19, 2015 Share Posted June 19, 2015 (edited) Har sett begrepet brukt på en tallverdi ifm håndkikkerter, hva betyr det? Er det i klasse med "lysgjennomgang"?? Edited June 20, 2015 by Guest Quote Link to comment Share on other sites More sharing options...
Jim114 Posted June 19, 2015 Share Posted June 19, 2015 Nikon viser veien: Relative brightness http://www.nikon.com/products/sportopti ... sic_06.htm Relative brightness Relative brightness value is obtained by squaring the diameter of the exit pupil. The greater the relative brightness is, the brighter the image will be. With 8x42 binoculars, the brightness is (42÷8)2= 28.1. This means that if the magnification is the same, the larger the effective diameter of the objective lens, the brighter the image will be. Do binoculars with the same exit pupil offer the same brightness? No. Brightness may vary even if the exit pupil is the same. This is because the amount of light reaching the viewer's eyes varies according to the number of lens elements and quality of lens/prism coatings. Superior optical design and highquality coating greatly contribute to the brightness of binoculars. Brightness values specified in product brochures, etc. are theoretical ones calculated in the design process. Please note these factors when comparing actual brightness values. Mvh Jim114 Quote Link to comment Share on other sites More sharing options...
Kiwi Posted June 20, 2015 Author Share Posted June 20, 2015 Takker! RB sier egentlig ikke så veldig mye. Quote Link to comment Share on other sites More sharing options...
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