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#1
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Grainy skye?
Why does the skye always look grainy on film?
Even on high resolution BW film....... Is it the film which react this way......or does the skye just look like that? Max |
#2
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Grainy skye?
Hi Max,
The graininess is due to the way that film reacts to light. The grains in the film are sensitive to light, and after development become more or less transparent, when exposed to more or less light. Of course, slide film and negative film opperate in opposite fashions, but the basic idea is the same. Some materials that are light sensitive have a steeper curve of reaction, than others and this is noticable in color films. The manufacture can use smaller grains and spread them out more, to compensate for this. In color slide film the sky always looks somewhat grainy, due to this effect. In any event, if you scan your slides or negatives, its easy to blur out the sky with Photoshop. Peace, -chasfs http://chasfs.com |
#3
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Grainy skye?
MXP wrote:
Why does the skye always look grainy on film? Sky tends to be an area of smooth tone, and of greater than average density on the negative. Graininess is strongly related to the density of silver on the negative and the smooth tone of the sky tends to make the graininess obvious. Even on high resolution BW film....... There I would tend to disagree. Sky from contact prints looks completely smooth to me. With T-Max 100 in Xtol 1:1 I can get five times enlargements at least in which I see not the slightest hint of grain on the print. Technical Pan is even better. Is it the film which react this way......or does the skye just look like that? No, the sky isn't normally grainy, but I don't think that the grain is necessarily a bad thing. I quite like the grain from 6x6 Tri-X enlarged to an 8x10, but if you want smooth then you should try Tmax 100 or Fuji Acros in Xtol. (Microdol-x gives even finer grain, but I don't really like the results from Microdol-X on Tmax 100.) Hope this helps, Peter. -- |
#4
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Grainy skye?
OK. A shame film react like this. It can look very grainy after some
USM in Photoshop. So I have to find a way to select the skye. The magic wand can maybe do it....... One should think that a digital sensor could react the same way. I will have a closer look at the skye in digital images. Max "chasfs" skrev i en meddelelse oups.com... Hi Max, The graininess is due to the way that film reacts to light. The grains in the film are sensitive to light, and after development become more or less transparent, when exposed to more or less light. Of course, slide film and negative film opperate in opposite fashions, but the basic idea is the same. Some materials that are light sensitive have a steeper curve of reaction, than others and this is noticable in color films. The manufacture can use smaller grains and spread them out more, to compensate for this. In color slide film the sky always looks somewhat grainy, due to this effect. In any event, if you scan your slides or negatives, its easy to blur out the sky with Photoshop. Peace, -chasfs http://chasfs.com |
#5
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Grainy skye?
I have worked a little with Gigabitfilm and here the grains in the skye
is quite visible. On other areas the film grains are very small (4000 dpi scan). On this film I can get much higher resolution than e.g. Velvia. When I tried Tmax100 I found resolution about the same as Velvia, but maybe the skye looks better on this film. Skye is not bad on Gigabit.....but the grains are visible. So it gives a "film look" when printed.....I am using R2400 in the moment. If people think it is a real silver print.....it could be fun. Max "Peter Irwin" skrev i en meddelelse ... MXP wrote: Why does the skye always look grainy on film? Sky tends to be an area of smooth tone, and of greater than average density on the negative. Graininess is strongly related to the density of silver on the negative and the smooth tone of the sky tends to make the graininess obvious. Even on high resolution BW film....... There I would tend to disagree. Sky from contact prints looks completely smooth to me. With T-Max 100 in Xtol 1:1 I can get five times enlargements at least in which I see not the slightest hint of grain on the print. Technical Pan is even better. Is it the film which react this way......or does the skye just look like that? No, the sky isn't normally grainy, but I don't think that the grain is necessarily a bad thing. I quite like the grain from 6x6 Tri-X enlarged to an 8x10, but if you want smooth then you should try Tmax 100 or Fuji Acros in Xtol. (Microdol-x gives even finer grain, but I don't really like the results from Microdol-X on Tmax 100.) Hope this helps, Peter. -- |
#6
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Grainy skye?
"MXP" wrote in message
... OK. A shame film react like this. It can look very grainy after some USM in Photoshop. So I have to find a way to select the skye. What you are seeing could be noise from your scanner or oversharpening. The magic wand can maybe do it....... That's one way, but... well, if it doesn't work well for you, come over to the photoshop group. One should think that a digital sensor could react the same way. I will have a closer look at the skye in digital images. Digital is cleaner, when it's good. |
#7
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Grainy skye?
"MXP" wrote in message
... I have worked a little with Gigabitfilm and here the grains in the skye is quite visible. On other areas the film grains are very small (4000 dpi scan). Is your scanner a _true_ 4000spi scanner? Even the Nikon (35mm) 4000spi scanner gives way to noise at high resolution. |
#8
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Grainy skye?
What scanner do you have and what resolution do you scan with? I find
that with my Microtek 120tf, I get less noticable grain if I scan at 3200 dpi, rather than 4000 dpi, without really losing any noticable detail. I often use the magic wand to select the sky. I blur it with gaussian blur or smart blur. I then invert the selection and use USM on the rest of the image. Sometimes it helps to feather the selection so the USM isn't noticable at the horizon. A note about using USM - its important to adjust the amount of USM for the print size. If you are going to print at different sizes, save a copy of the image without USM. Then do USM individually for each print size. Peace, -chasfs http://chasfs.com MXP wrote: OK. A shame film react like this. It can look very grainy after some USM in Photoshop. So I have to find a way to select the skye. The magic wand can maybe do it....... One should think that a digital sensor could react the same way. I will have a closer look at the skye in digital images. Max "chasfs" skrev i en meddelelse oups.com... Hi Max, The graininess is due to the way that film reacts to light. The grains in the film are sensitive to light, and after development become more or less transparent, when exposed to more or less light. Of course, slide film and negative film opperate in opposite fashions, but the basic idea is the same. Some materials that are light sensitive have a steeper curve of reaction, than others and this is noticable in color films. The manufacture can use smaller grains and spread them out more, to compensate for this. In color slide film the sky always looks somewhat grainy, due to this effect. In any event, if you scan your slides or negatives, its easy to blur out the sky with Photoshop. Peace, -chasfs http://chasfs.com |
#9
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Grainy skye?
"chasfs" skrev i en meddelelse ups.com... What scanner do you have and what resolution do you scan with? I find that with my Microtek 120tf, I get less noticable grain if I scan at 3200 dpi, rather than 4000 dpi, without really losing any noticable detail. I use a Coolscan 9000 in 4000 dpi mode. It can do multi sample to reduce noise from the CCD. Normally I use 8x multi sample. This gives noise free results. So the grains is not noise from the scanner but real grains in the film. The Gigabitfilm has so much information that I could use more than 4000 dpi. A 8000 dpi scanner would be perfect, but for A4 size prints 3200 dpi would be sufficient. For A3 or A3+ 4000 dpi is better. I often use the magic wand to select the sky. I blur it with gaussian blur or smart blur. I then invert the selection and use USM on the rest of the image. Sometimes it helps to feather the selection so the USM isn't noticable at the horizon. A note about using USM - its important to adjust the amount of USM for the print size. If you are going to print at different sizes, save a copy of the image without USM. Then do USM individually for each print size. I will try this trick next time.....using invers selection etc. Normally I save a copy without any USM. The good thing about film is that you can always scan again. Max Peace, -chasfs http://chasfs.com MXP wrote: OK. A shame film react like this. It can look very grainy after some USM in Photoshop. So I have to find a way to select the skye. The magic wand can maybe do it....... One should think that a digital sensor could react the same way. I will have a closer look at the skye in digital images. Max "chasfs" skrev i en meddelelse oups.com... Hi Max, The graininess is due to the way that film reacts to light. The grains in the film are sensitive to light, and after development become more or less transparent, when exposed to more or less light. Of course, slide film and negative film opperate in opposite fashions, but the basic idea is the same. Some materials that are light sensitive have a steeper curve of reaction, than others and this is noticable in color films. The manufacture can use smaller grains and spread them out more, to compensate for this. In color slide film the sky always looks somewhat grainy, due to this effect. In any event, if you scan your slides or negatives, its easy to blur out the sky with Photoshop. Peace, -chasfs http://chasfs.com |
#10
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Grainy skye?
I've never taken photographs on the Isle of Skye but I don't see why
the sky should be any more grainy there compared to elsewhere. If you want finer grain don't scan your b&w film. It's that simple. MXP wrote: Why does the skye always look grainy on film? Even on high resolution BW film....... Is it the film which react this way......or does the skye just look like that? Max |
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