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DPChallenge Forums >> Individual Photograph Discussion >> Channel Mixer film emulation
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 07/20/2007 10:23:03 PM · #1
Found this on the web as 'formulas' for emulating various black and white films via channel mixer. Red, Green and Blue channel values respectively:

Agfa 200X 18,41,41
Agfapan 25 25,39,36
Agfapan 100 21,40,39
Agfapan 400 20,41,39
Ilford Delta 100 21,42,37
Ilford Delta 400 22,42,36
Ilford Delta 400 Pro & 3200 31,36,33
Ilford FP4 28,41,31
Ilford HP5 23,37,40
Ilford Pan F 33,36,31
Ilford SFX 36,31,33
Ilford XP2 Super 21,42,37
Kodak Tmax 100 24,37,39
Kodak Tmax 400 27,36,37
Kodak Tri-X 25,35,40
 07/20/2007 10:28:04 PM · #2
coo! thanks for the tip!
 07/20/2007 10:29:38 PM · #3
Yeah I thought it was pretty nice. If you make them all once you can just save them and load them up on demand later.
 07/20/2007 10:30:17 PM · #4
Thanks, I appreciate the info.
 07/20/2007 10:34:08 PM · #5
Where did you find this? I'm sorta curious how they came up with the values...
 07/20/2007 10:36:15 PM · #6
Cool, will def. have to try these!! Thanks!
 07/20/2007 10:54:18 PM · #7
Originally posted by routerguy666:
Found this on the web as 'formulas' for emulating various black and white films via channel mixer. Red, Green and Blue channel values respectively:

Agfa 200X 18,41,41
Agfapan 25 25,39,36
Agfapan 100 21,40,39
Agfapan 400 20,41,39
Ilford Delta 100 21,42,37
Ilford Delta 400 22,42,36
Ilford Delta 400 Pro & 3200 31,36,33
Ilford FP4 28,41,31
Ilford HP5 23,37,40
Ilford Pan F 33,36,31
Ilford SFX 36,31,33
Ilford XP2 Super 21,42,37
Kodak Tmax 100 24,37,39
Kodak Tmax 400 27,36,37
Kodak Tri-X 25,35,40


some have a 4th value is that the constant?
ETA nevermind that first # i figured out is the name of the film...duh

Message edited by author 2007-07-20 22:56:15.
 07/20/2007 10:57:38 PM · #8
All of them have 3. The first is the ISO of the films in the ones that have "4" :-)

Ooops, you beat me to it :-)

Message edited by author 2007-07-20 22:58:03.
 07/20/2007 11:02:49 PM · #9
What? No provia?

Try: Blue channel, select monochrome, set blue to 0, set red/green to 60 to start and adjust for highlights. Add contrast curves. say, WOW!
 07/20/2007 11:24:19 PM · #10
Isn't provia color film?
 07/20/2007 11:26:05 PM · #11
Color Transparency film to be exact.
 07/20/2007 11:26:25 PM · #12
Originally posted by jmsetzler:
Where did you find this? I'm sorta curious how they came up with the values...


Sorry I didn't save the link. It was a pdf that turned up not too far into a google search for 'emulating 5d monochrome in photoshop' of all things... Same pdf talked about emulating color films as well.
 07/20/2007 11:39:26 PM · #13
Originally posted by fotomann_forever:
Color Transparency film to be exact.


heh, oops :P

07/20/2007 11:46:16 PM · #14
Eh, regardless, the channel mixer technique that I put up is pretty neato.

Neopan I guess would have been the correct Fuji equivalent.

It's interesting to note that channel mixer works a little differently when you choose monochrome depending on what channel you start in, anyways.
 07/21/2007 02:33:37 AM · #15
interesting. can we see some examples?
 07/24/2007 11:44:19 PM · #16
Examples
 07/24/2007 11:53:14 PM · #17
Originally posted by digitalknight:
Examples

Great Shot! and very nice conversion...but I guess I'm blind I see no difference in any of them...
 07/24/2007 11:54:47 PM · #18
Originally posted by jackal9:
Originally posted by digitalknight:
Examples

Great Shot! and very nice conversion...but I guess I'm blind I see no difference in any of them...


I thought it was just me ... I didn't see any difference either ... but then again, I've been drinking so it could easily be my eyesight!!
 07/25/2007 12:13:25 AM · #19
Originally posted by routerguy666:
Yeah I thought it was pretty nice. If you make them all once you can just save them and load them up on demand later.

That's a good idea as well.
 07/25/2007 12:52:53 AM · #20
Originally posted by jackal9:
Originally posted by digitalknight:
Examples

Great Shot! and very nice conversion...but I guess I'm blind I see no difference in any of them...


The differences are subtle but there. Try clicking on 1 4 8 then 12 and watch the right side of the face.

07/25/2007 12:56:00 AM · #21
if you look at the numbers, the difference is very small from film to film. Pretty subtle differences.

I went with the IllfordXP2 myself for this photo.
 07/25/2007 09:27:21 AM · #22
Alienskin Exposure allows you to do the same thing, but also takes into account the grain factor.
 07/25/2007 09:30:20 AM · #23
Originally posted by ajdelaware:
Alienskin Exposure allows you to do the same thing, but also takes into account the grain factor.


Isnt that the one thats 1,500 dollars?
 07/25/2007 09:35:25 AM · #24
$200
 07/25/2007 10:56:14 AM · #25
Originally posted by routerguy666:
Found this on the web as 'formulas' for emulating various black and white films via channel mixer.


Great! Thanks
... and thanks for the comment on the rhythm ;)
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