Newsmeldung von slashCAM:Basic Video Production: Video Production Basics: intensity of rudi - 30 Dec 2009 00:20:00 full article
Antwort von Bernd E.:
1:1 ... The intensity of a lens would be ideal and would mean that the lens can pass through the light ... According to this account a lens with even greater intensity would like to create internal 1:0,85, for example 1:0.7 or even extra light, however, because, therefore, in the camera would get more light than the front falls into it. That does not, of course, because the definition of intensity is different: you simply refers to the mathematical ratio of the largest aperture to focal. A KB-Normaloptik 1:1 / 50mm thus has a maximum aperture of 50mm also. S.Licht With the amount that pass through the system or swallowed, has nothing to do.
Antwort von domain:
The real aperture diameter has little to do with the light intensity. Even with a 1:1 / 50 mm lens, the diameter of the open aperture is much smaller than 50 mm.
Was originally meant for the front lens diameter (lens diameter) relative to the focal. Today, the front lens diameter, however, says not too much off, because the relationships with have new types of glass and special Vergütungververfahren changed very significantly in the direction of better light transmission.
And of course, are synonymous higher light intensities than 1:1 with the corresponding effect possible and have been synonymous realized already, for example, 1:0.7 for special lenses and without independent internal "light generation."
Antwort von Bernd E.:
... Was originally meant for the front lens diameter (lens diameter) relative to the focal ... Thanks for the addition to my somewhat simplified representation! Who wants to know it exactly, can the distinction of "f-stop googling" and "T-Stop." The latter will actually take into account the amount of light is lost in the optical system.
... of course, are synonymous higher light intensities than 1:1 ... possible and have been synonymous realized ... without independent internal "light generation" ... That was the hook of my note: At this same lenses I had moved me.
Antwort von ruessel:
In this way, could be an opening of 1: get 0.35, which is still (1962), the highest ever achieved brightness of a lens. " http://forum.digitalfotonetz.de/viewtopic.php?p=282797&highlight = # 282,797
Zeiss f/0.7 lens in special focusing mount for "Barry Lyndon".
http://www.visual-memory.co.uk/sk/ac/len/page1.htm
zum Bild LEICA M8.2, ISO 320, f/0,95, 1/90 s
After over 30 years Leica breaks its own record and represents the speed aspherical lens in front of the world: the Leica M-NOCTILUX 1:0,95 / 50 mm ASPH.
Antwort von domain:
@ Ruessel:
An idea for our night owls 1:0.35 ;-)
Early 60-s high light intensities in any case all the rage and were available as standard synonymous
http://www.taunusreiter.de/Cameras/Canon7_095_10.jpg
draufkam until that such Lenses due to the many and a great big lens surfaces are not always desirable Lensflare were produced, and generally a rather modest and, although MTF synonymous dimmed.
Just recently again but she seems to disciples of the night with their Pixelbinning cameras to make it interesting.
Antwort von ruessel:
This is all priceless!
Here is a re-rendered, very Bright Crystal: http://de.leica-camera.com/photography/m_system/lenses/133.html
cost "only" 7995, - Euronen ....
who provided me with this? http://homepage2.nifty.com/akiyanroom/redbook-e/repro/tv.html
Antwort von B.DeKid:
;-) SWITAR Bolex 13mm F0.9 (-;
