Negafix doesn't like the beach
PostPosted: Mon Feb 01, 2010 12:49 pm
Hi,
I am trying to scan some Fuji Reala 100 ASA 35mm negatives in my Epson V750 using SilverFast Ai and am getting some very strange results.
The problem is a very strong magenta cast on the beach scenes but is also present to a lesser degree on other types of shot.
In conjunction with this the beach scenes are rendered with very high contrast and the sky is rendered extremely grainy. The sand will be deep orange, the sea a kind of blue/magenta colour and the sky has a very magenta cast. In other words the scan resulting image is nothing like that which has been recored.
The problem shows up at its most extreme with any photograph taken on a beach that includes mostly sand, sea, waves (breakers crashing on the shore causing white foam) taken on a dull overcast day and i.e. images that don't have a great range of tones. The problem also appears in other images that have a greater tone variation but not in such an extreme way. For example a beach scene on a sunny day is still "over cooked" with the sand a far too saturated a colour towards red. Or a shot with a river part of the water may end up with a magenta cast.
If I scan the negative as a positive and convert this in my photo editing software I get a much more natural image in terms of colour and contrast and no grain in the sky. Scanning the same image in Epson scan supplied with the scanner is also not giving the problem described above.
I don't know if the canned NagaFix profile for Reala is wrong or if it is something else but I can't trust NgaFix to batch scan negatives.
It looks to me as though the software is trying to set black and white points incorrectly. There is no shadow detail as such in the beach scenes and the highlight is the white foam on the waves so it is not inherently very bright anyway. In terms of contrast the result looks like I had edited an image in photoshop and moved the histogram sliders in to the centre form the left an right by a large amount. I do not know what could cause the magenta cast.
I have tried moving the tolerance slider with little effect and anything else I have tried has not been able to solve the problem. I can supply examples to illustrate the problem if you wish but have you any recommendations as to how I can fix this?
Thanks in advance.
I am trying to scan some Fuji Reala 100 ASA 35mm negatives in my Epson V750 using SilverFast Ai and am getting some very strange results.
The problem is a very strong magenta cast on the beach scenes but is also present to a lesser degree on other types of shot.
In conjunction with this the beach scenes are rendered with very high contrast and the sky is rendered extremely grainy. The sand will be deep orange, the sea a kind of blue/magenta colour and the sky has a very magenta cast. In other words the scan resulting image is nothing like that which has been recored.
The problem shows up at its most extreme with any photograph taken on a beach that includes mostly sand, sea, waves (breakers crashing on the shore causing white foam) taken on a dull overcast day and i.e. images that don't have a great range of tones. The problem also appears in other images that have a greater tone variation but not in such an extreme way. For example a beach scene on a sunny day is still "over cooked" with the sand a far too saturated a colour towards red. Or a shot with a river part of the water may end up with a magenta cast.
If I scan the negative as a positive and convert this in my photo editing software I get a much more natural image in terms of colour and contrast and no grain in the sky. Scanning the same image in Epson scan supplied with the scanner is also not giving the problem described above.
I don't know if the canned NagaFix profile for Reala is wrong or if it is something else but I can't trust NgaFix to batch scan negatives.
It looks to me as though the software is trying to set black and white points incorrectly. There is no shadow detail as such in the beach scenes and the highlight is the white foam on the waves so it is not inherently very bright anyway. In terms of contrast the result looks like I had edited an image in photoshop and moved the histogram sliders in to the centre form the left an right by a large amount. I do not know what could cause the magenta cast.
I have tried moving the tolerance slider with little effect and anything else I have tried has not been able to solve the problem. I can supply examples to illustrate the problem if you wish but have you any recommendations as to how I can fix this?
Thanks in advance.