I have a Nikon D90 DLSR and and from time to time I want to convert color photographs these into B&W photos. I use the open-source and completely free GIMP to edit the pictures and do B&W conversion.
Using the built-in grey scale conversion often doesn’t come out to nicely, so I was wondering how to emulated the classic B&W films using the channel mixer in GIMP. I turns out that Petteri Sulonen on his blog www.prime-junta.net had done just that. On the left I am showing the Channel Mixer window in Gimp to converting a color photography using the Ilford XP2 Super channel settings. Below is list of his findings (I have done this mainly to have a online copy in case his blog goes offline).
My only small contribution is a ZIP file with all the profiles saved as GIMP channel mixer settings files, so the profiles can easily be loadd: GIMP-BW-film-Channel-Mixer.zip 6KB.
|Ilford Delta 100||21||42||39|
|Ilford Delta 400||22||42||37|
|Ilford Delta 400pro||31||36||33|
|Ilford XP2 Super||21||42||37|
|Kodak Tmax 100||24||37||39|
|Kodak Tmax 400||27||36||37|