filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread Oostrom, Jerry
Hello people, I have this question: Should a white balanced vuescan scan with film setting generic of Ilford XP2 (a monochromatic film) look black and white? I ask this because the first time I used this film I got sepia toned prints back from the lab. The other times they were greenish or

Re: filmscanners: horribly dirty negatives from SS4000

2000-11-14 Thread Rob Geraghty
Geoff wrote: I'm not sure how labs manage to scratch negs so badly! Ever watched how they throw them around before they sleeve them? Rob

filmscanners: Chemical Film Resolution.

2000-11-14 Thread Chris McBrien
At risk of starting World War 3, what is the resolution of Chemical Film? The National Geographic magazine used to ask for any photos to be submitted using Kodachrome Film, so let's say Kodachrome 64 as a good all round film. I've tried searching for the answer but haven't found 'a number'. I

RE: filmscanners: Chemical Film Resolution.

2000-11-14 Thread shAf
Chris asks ... ... what is the resolution of Chemical Film? The National Geographic magazine used to ask for any photos to be submitted using Kodachrome Film, so let's say Kodachrome 64 as a good all round film. ... A number I've read, which seems to be a near concensus, is

RE: filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread Laurie Solomon
A very brief and simple answer to your inquiry to the initial question is yes they should look black and white. The reasons the prints from the processor typically do not come out black and white is because the prints usually are printed on a dye based color photographic paper base which usually

Re: filmscanners: Chemical Film Resolution.

2000-11-14 Thread James L. Sims
Chris, It does seem to be a hot topic but I would like to share my experience and observations on this subject. I have been involved in a number of studies regarding resolution as it applies to process cameras, still, motion picture, and television (including HDTV). Film resolution is only one

Re: filmscanners: Chemical Film Resolution.

2000-11-14 Thread Meino de Graaf
Look at http://www.kodak.com/cluster/global/en/professional/support/techPubs/e55/e55.shtml#03 en go to the bottom of the document for the buttons of the modulation transfer curves There is also a pdf document available on this kodak site. Meino Chris McBrien wrote: At risk of starting

RE: Re[7]: filmscanners: Re: monitors

2000-11-14 Thread Derek Clarke
That so-called resizing is nothing of the kind! All it does is change the dpi figure in the file, the picture content is completely unchanged. In article [EMAIL PROTECTED], [EMAIL PROTECTED] (Laurie Solomon) wrote: Resizing in Photoshop is not interpolation and does not use Bicubic,

RE: Re[7]: filmscanners: Re: monitors

2000-11-14 Thread Austin Franklin
The only dimensions that matter are the number of pixels. The dpi and hence the "physical dimensions" are utterly meaningless. That's erroneous to say they are 'utterly meaningless'. They CLEARLY are utterly meaningFUL to the printer driver, and, along with the xy number of pixels,

RE: filmscanners: Chemical Film Resolution.

2000-11-14 Thread shAf
Meino writes ... Look at http://www.kodak.com/cluster/global/en/professional/ support/techPubs/e55/e55.shtml#03 go to the bottom of the document for the buttons of the modulation transfer curves. Such curves do eliminate subjective interpretation, but it's still necessary to

RE: Re[7]: filmscanners: Re: monitors

2000-11-14 Thread Laurie Solomon
I am afraid that once again you do not appear to be on the same page as the other discussants. As I remember the discussion between Frank and myself, it firstly was not restricted to the effects of resizing/rescalling without resampling of images in Photoshop on the monitor display of those

RE: Re[7]: filmscanners: Re: monitors

2000-11-14 Thread Laurie Solomon
I am not sure we are engaged in the smae conversation; but since you appear to be responding to something I said and I was in the conversation first, I am going to assume that my interpretation of the original conversation prior to your entering into it is the correct one. In that conversation,

Re: filmscanners: Prints using Acer ScanWit

2000-11-14 Thread photoscientia
Hi Geoff Geoff Stafford wrote: I have an Acer ScanWit 2720S. Recently I took some 2700 dpi scans (2550x3720) on a CD into Boots the Chemists and had prints made. Their system feeds the image files straight into the mini-lab. The results from negs or slides are superb, That's great to

Re: filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread Stephen Jennings
I believe that XP2 film can be processed C-41 like color neg and is often printed on color paper. The green or brown or blue print color is due to the processor operator's sense of neutral color balance. If you scan them as grey scale you should get a neutral bw image. If you scan as rgb

Re: filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread johnprendergast.freeserve.co.uk
Am I being naive here or does the settings for colour film take into account, neutralizing the orange mask on the film base, and the settings for B/W neg only have to adjust the gamma, to correct for the film base, hence the dark reds, when printing colour neg onto B/W paper because of the high

RE: filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread Laurie Solomon
The settings for color negative film usually involve a list of different film manufacturers ( if not film types as well) wherein each of the listed items accounts for the orange mask used by that brand of film or film type there is some variation in shades of orange of the mask depending on the

RE: filmscanners: Best method for downsizing images

2000-11-14 Thread Rob Geraghty
Jerry wrote: Which of the next 2 procedures results in more loss of picture quality? 1. Downsize an image (w.r.t. number of pixels) using bicubic resampling, then go from 16 bit / pixel to 8 bit / pixel. 2. Go from 16 bit / pixel to 8 bit / pixel, then downsize an image (w.r.t. number of pixels)

Re: filmscanners: Chemical Film Resolution.

2000-11-14 Thread Arthur Entlich
Chris McBrien wrote: At risk of starting World War 3, what is the resolution of Chemical Film? The National Geographic magazine used to ask for any photos to be submitted using Kodachrome Film, so let's say Kodachrome 64 as a good all round film. I've tried searching for the answer

Re: filmscanners: horribly dirty negatives from SS4000

2000-11-14 Thread Arthur Entlich
Rob Geraghty wrote: Geoff wrote: I'm not sure how labs manage to scratch negs so badly! Ever watched how they throw them around before they sleeve them? Rob Many labs have a very bad policy with film handling. The majority of people do not order reprints, and since the film is

Re: filmscanners: Re: monitors

2000-11-14 Thread Arthur Entlich
Austin Franklin wrote: The only dimensions that matter are the number of pixels. The dpi and hence the "physical dimensions" are utterly meaningless. That's erroneous to say they are 'utterly meaningless'. They CLEARLY are utterly meaningFUL to the printer driver, and, along with the

Re: filmscanners: horribly dirty negatives from SS4000

2000-11-14 Thread Arthur Entlich
Rob Geraghty wrote: Geoff wrote: I'm not sure how labs manage to scratch negs so badly! Ever watched how they throw them around before they sleeve them? Rob Many labs have a very bad policy with film handling. The majority of people do not order reprints, and since the film is

Re: filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread Arthur Entlich
HI Jerry, I'm sorry that I not going ton try to answer you earlier question concerning which procedure creates less loss (downsampling, then lowering bit depth or the other way around) because it will probably invoke too much back and forth conjecture based upon theoretical grounds, when

Film handling was Re: filmscanners: horribly dirty negatives from SS4000

2000-11-14 Thread Rob Geraghty
Art wrote: Many labs have a very bad policy with film handling. The majority of people do not order reprints, and since the film is usually printed before it is cut and sleeved, a lot of the scratches are put on after the printer is done with them, or by the automated film gate (again, after the

Re: filmscanners: Profiling, Ilford XP2 and Vuescan.

2000-11-14 Thread johnprendergast.freeserve.co.uk
I am trying to say, because colour neg films all have different types of orange base fog, the various software have to make colour adjustments to correct for this, B/W NEG has no such colour in its base, and if you tell the software, that B/W neg is a colour film, it will correct for the orange