Ultraviolet up through X-Rays and infrared down to baking in the car.
I’ve heard of that with uv photography. The researchers were using an etching technique to remove the gelatin from the surface of the emulsion to expose the silver halide grains and improving the sensitivity at those wavelengths. That article was a lot of years ago, cant remember who was doing it.Not quite. That spectral sensitivity is not continuous.
For instance at the UV range there soon is the obstacle of opacity of the binder, about 250nm. For IR the nominal limit is at about 1200nm, however with ultra-long exposure times something in the region of 50,000nm is possible.
I use toy IR goggles. It has potent IR LEDS as illumination source. I can stare at any non IR film for a half hour with ZERO effects (arms length from the source ). Film manufacturers don't stumble around blind. From what I've been able to find there are areas that IR is used to view what's going on. Emulsions are brilliant white on my LED viewscreen on the goggles. Black marker ink is white, Jobo reels are brilliant white.
Don't try walking around. Very narrow angle of view single lens, no depth perception. Jakks Pacific Spy Net night vision "binoculars " I bungee these to my head, you look like an idiot, but no one else can see you . I can read the part numbers on Jobo stuff. Amazing toy, around 60 bucks.I've been wanting a pair of these goggles myself. I hate stumbling around in the dark. What kind do you have?
Don't try walking around. Very narrow angle of view single lens, no depth perception. Jakks Pacific Spy Net night vision "binoculars " I bungee these to my head, you look like an idiot, but no one else can see you . I can read the part numbers on Jobo stuff. Amazing toy, around 60 bucks.
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The duct tape is covering the LEDS that are near IR.they put out dim red light . The other LED array is pure IR. No problem.Awesome, thanks for responding. Those googles look like pure science fiction.
The duct tape is covering the LEDS that are near IR.they put out dim red light . The other LED array is pure IR. No problem.
Nope, I didn't try . I have a IR flood light that I tried for a while ,but I went back to the built in. All the security stuff now you can get all kinds of things.Good to know. Did they fog film before you put on the duct tape?
"Infradead to ultraviolent". (Douglas Adams, may he rest in peace.)So with presently available or specialty film stock, the answer seems to be 250nm to 1200nm with 50,000nm in extreme circumstances.
I made a little video 2 minutes using the SPYNET recording goggles
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It doesn’t show the low wavelengths/high frequency of their sensitivity, but:
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