Someone needs to do an IR version. It might be me.
The traditional way of Kodak Aerochrome was to have the IR red too.I've been thinking about this as well, as I now have a #89B filter and some SFX200 to play with.
But I'm wondering... would the IR be a separate channel from visible red? And if so, would the #25 need to be combined with an IR cut filter to isolate only visible red? Then there's the question of how to colorize the IR channel in post... but I suppose that's the fun of it, eh?
You'll probably beat me to it, but it's now on my list of experiments to try. I've never tried IR film, so might as well go off the deep end and try it with trichromy, right?Someone needs to do an IR version. It might be me.
I've been thinking about this as well, as I now have a #89B filter and some SFX200 to play with.
But I'm wondering... would the IR be a separate channel from visible red? And if so, would the #25 need to be combined with an IR cut filter to isolate only visible red? Then there's the question of how to colorize the IR channel in post... but I suppose that's the fun of it, eh?
Just recently, I came across two YouTube videos for infrared trichromy. I think they each did it a little bit differently, but I think both assigned the IR to the red channel to colorize. If I'm interpreting the comments correctly, the first example used R72 for red, 58 green, and 47b blue:The traditional way of Kodak Aerochrome was to have the IR red too.
But of course vegetation would be bright red or orange depending on whether you mixed it with a full RGB set, turning the whole photo to a Mars look.
Maybe the IR should be used as a luminance channel only..?
Just recently, I came across two YouTube videos for infrared trichromy. I think they each did it a little bit differently, but I think both assigned the IR to the red channel to colorize. If I'm interpreting the comments correctly, the first example used R72 for red, 58 green, and 47b blue:
...
The advantage of using the IR channel as a luminance channel would be that it accomplishes what most people try to do anyway in a landscape photo.You'll probably beat me to it, but it's now on my list of experiments to try. I've never tried IR film, so might as well go off the deep end and try it with trichromy, right?
Just recently, I came across two YouTube videos for infrared trichromy. I think they each did it a little bit differently, but I think both assigned the IR to the red channel to colorize. If I'm interpreting the comments correctly, the first example used R72 for red, 58 green, and 47b blue:
The second video used R72 for red, no filter (I think?) for green, and some unidentified blue filter:
Another IR example I found on Reddit used "...RGB channels of the color picture are occupied by the infrared, red, and green filtered images respectively (as per Ektachrome EIR dye-mapping)."
https://www.reddit.com/r/analog/comments/44pogg/35mm_color_infrared_trichrome_mod_nimslo_3d_4x/
@perkeleellinen, I use 52mm circular screw-in color filters from Tiffen, specifically the Tiffen #25 Red, #58 Green, and #47 Blue filters. I'm not sure if Tiffen has a distributor in the UK, but I think any other brand filter (Hoya, B+W, Heliopan, etc...) with the same or similar Wratten filter numbers would work. Hope that helps!This is a great thread!
I'd like to try this by shooting Scala and projecting the three images through three aligned projectors. I'm having a lot of trouble finding tricolour filters in the UK, though. Anyone got a source?
@perkeleellinen, Tiffen #25 Red, #58 Green, and #47 Blue filters.
Quercus chrysolepis, canyon live oak.
Nikon FM2n, AI Nikkor 50mm f/1.8S, Ultrafine eXtreme 400, developed in LegacyPro L110 at 1:31 for 5.5 minutes. Three individual black and white frames shot through Tiffen #25 Red, #58 Green, and #47 Blue filters, respectively, then combined using GIMP to create a trichrome color image.
2020.10.13 Roll #261-05344-positive-trichrome.jpg by dourbalistar, on Flickr
Thanks, @jawarden! Every time I do it, I'm never sure how it'll turn out. All part of the fun, I guess!you’ve got it nailed down!
Nikon FM2n, AI Nikkor 50mm f/1.8S, Ultrafine eXtreme 400, developed in LegacyPro L110 at 1:31 for 5.5 minutes. Three individual black and white frames shot through Tiffen #25 Red, #58 Green, and #47 Blue filters, respectively, then combined using GIMP to create a trichrome color image.
2020.10.13 Roll #261-05351-positive-trichrome.jpg by dourbalistar, on Flickr
Thank you @foc, that's very kind, glad you enjoy the images. What you call a subtle vintage look, I sometimes call "pesky green or magenta color cast".Again, as always, a great example.
It may be just my screen, but your colours appear to have a certain subtle vintage look that I think looks great.
I look forward to seeing more of your results.
Wow, tricolor with 4x5 is a whole other level of commitment...I've tried this for tri-colour carbon transfer with 4x5 film. Was interesting but I never got past the testing phase, though.
Wow, tricolor with 4x5 is a whole other level of commitment...
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?