D&A
Well-known
Hi Glenn,
Great info and equally great links! Thanks ever so much for posting them. The "blue sky-magenta/white leaves effect" is often seen with Kodak IR color film..which I used to faily often. This effect can also be obtained using the Leica M8 and certain other digital cameras and B&W 092 filter, which lets in more visable light than the Hoya R72. As noted on the extenive IR website you linked...R72 primarily results in an overcast of red-magenta over the entire image and that is what I observed. One can change the color of the entire red-magenta cast to another color..but it remains basically a single color cast (with possibly a bit of lighter folliage). Of course there are variations. If one fiddles with the image, one can also obtain a blue-purple overcast with whitish leaves. I've also been able to obtain this effect (as seen in another link you provided. Yet none of these resesmbles the tyupically seen blue sky0magenta/white leaves type of effect.
Apparently the only way to get that effect with M8 (and some other cameras) in order to closely emulate Kodak color Ir film is to use the B&W 092 filter...at least that is what I have observed so far. The B&W 092 filter allows more of the visable light spectrum through, allowing for a wider variety of "false" colors....but at the expense of a fairly dramatic B&W IR effect. It's a trade-off and it all depends what one is looking for. The stronger IR B&W 093 filter on the other hand, is even a more potent IR filter...and the images that result are basically monocrome with very dramatic black skies...but almost no false colors of any sort (again depending on cameras sensitivity to IR)).
You are correct,, the sensitivity of the cameras chip plays as great a role in color IR reproduction as does the kind of IR filter used. In-camera processing is also important!
I think one day soon, I'll try and get a hold of a B&W 092 and see if obtaining the false color effect of Kodak IR film is obtained with the M8. From what I've seen in other files posted...this is possible with the 092. The R72, although superior for B&W IR....blocks too much of the visable specturm in order to obtain what I was originally hoping for. Many thanks again!
Dave (D&A)
Great info and equally great links! Thanks ever so much for posting them. The "blue sky-magenta/white leaves effect" is often seen with Kodak IR color film..which I used to faily often. This effect can also be obtained using the Leica M8 and certain other digital cameras and B&W 092 filter, which lets in more visable light than the Hoya R72. As noted on the extenive IR website you linked...R72 primarily results in an overcast of red-magenta over the entire image and that is what I observed. One can change the color of the entire red-magenta cast to another color..but it remains basically a single color cast (with possibly a bit of lighter folliage). Of course there are variations. If one fiddles with the image, one can also obtain a blue-purple overcast with whitish leaves. I've also been able to obtain this effect (as seen in another link you provided. Yet none of these resesmbles the tyupically seen blue sky0magenta/white leaves type of effect.
Apparently the only way to get that effect with M8 (and some other cameras) in order to closely emulate Kodak color Ir film is to use the B&W 092 filter...at least that is what I have observed so far. The B&W 092 filter allows more of the visable light spectrum through, allowing for a wider variety of "false" colors....but at the expense of a fairly dramatic B&W IR effect. It's a trade-off and it all depends what one is looking for. The stronger IR B&W 093 filter on the other hand, is even a more potent IR filter...and the images that result are basically monocrome with very dramatic black skies...but almost no false colors of any sort (again depending on cameras sensitivity to IR)).
You are correct,, the sensitivity of the cameras chip plays as great a role in color IR reproduction as does the kind of IR filter used. In-camera processing is also important!
I think one day soon, I'll try and get a hold of a B&W 092 and see if obtaining the false color effect of Kodak IR film is obtained with the M8. From what I've seen in other files posted...this is possible with the 092. The R72, although superior for B&W IR....blocks too much of the visable specturm in order to obtain what I was originally hoping for. Many thanks again!
Dave (D&A)
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