je piatok a tak sa zabavam brusenim po sialenostiach a dosiel som k tomuto.
Poznate niekto tuto hyperscitlivovaciu 
techniku? Nepreberalo sa to tu uz?
je to nieco ako latensification uz pocas expozicie a nasiel som zopar papierov, ktore sa tym zaoberali, ale nic nie je dostupne full-textovo. zaklad asi takyto :
The best CPA system I ever built used fiber optics to conduct the latensification light into the film chamber, and the light source was a small, hot shoe mounted flash unit. The Xenon strobe was daylight balanced, so it could be used with daylight color film. The incandescent (grain of wheat bulb) systems needed to be set to a different brightness at every shutter speed, pulsed Xenon or pulsed LED eliminated this requirement.
nejake vycucy :
The basic Concurrent Photon Amplification (CPA) technique has been modified and optimized for two Kodak color negative films: Kodak Kodacolor-II and Kodak 2445. Speed increases of up to 8 times (3 stops) have been achieved with good color balance and good print contrast. A CPA capability for Kodacolor-II and a range of black and white films from Kodak Pan-X to Kodak Tri-X was installed into two Pentax Spotmatic II, 35mm cameras. Power and controls for the CPA circuits are contained in a detachable case which fastens neatly underneath the camera bottom without obstructing any of the camera functions and provides a single lever activator of the CPA lamps and release of the camera
http://books.google....AAJ&redir_esc=y
This thesis evaluates the effect of concurrent photon amplification (CPA) on Kodak Tri-X Pan emulsion in regard to image quality. The study evaluated detective quantum efficiency (DQE), modulation transfer function (MTF), and information content (IC) as a function of exposure in a comparison between normal exposure and CPA. The results showed CPA to enhance image quality relative to normal exposure at very low exposure levels. As the exposure was increased, normally exposed images became comparable and then exceeded CPA exposures in image quality. The exposure level at which normal exposure became preferential was distinct with each image quality measure. A computer program is included.
http://books.google....AAJ&redir_esc=y
If you want to get this to work even better, make the white light exposure happen simultaneously with the main exposure. In latensification, you typically try to pre-expose the film to a level just below fogging. At this point, the silver grains are in an unstable state, and many of them will collapse back to an unexposed state (wasting the preflash) before you get around to actually taking the picture. If you feed in the latensification light simultaneously with the main exposure, there's no "forgetting" factor. It also "cures" reciprocity failure on long exposures.
The first fellow I read about doing this back in 1976 called it "concurrent photon amplification". We used to add grain of wheat bulbs or LEDS in the mirror chamber to add controlled amounts of latensification. The best CPA system I ever built used fiber optics to conduct the latensification light into the film chamber, and the light source was a small, hot shoe mounted flash unit. The Xenon strobe was daylight balanced, so it could be used with daylight color film. The incandescent (grain of wheat bulb) systems needed to be set to a different brightness at every shutter speed, pulsed Xenon or pulsed LED eliminated this requirement.
If you're still interested in this technique, I'd consider investigating pulsed white LEDs as the latensification source. Or continuous LEDs if you're going to put something like that in your swing lens Horizon. You'll have to filter the LEDS to proper daylight balance, but it's a heck of a lot easier than filtering grain or wheat incandescents.
http://www.dpreview....s/post/16531450
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