Frits, I don't know if you already do this or not, but from Vuescan Help I quote: "The first thing to do is to compute a fixed exposure for this roll of film (i.e. how long to expose the CCD when scanning the film) and the mask color (i.e. the color of the clearest part of the film, orange for negatives and white for slides).
If you're scanning negative film, find a frame that has the most clear film in the frame (i.e. the most underexposed frame) and if you're scanning slide film, find a frame that's the most over-exposed. Set "Device|Media type" to match the film type, turn on "Device|Auto exposure", and turn on "Color|Auto mask". Set "Device|Scan resolution" to low resolution (to speed up this step) and press the "Preview" button followed by the "Scan" button. Regardless of the lighting conditions, shutter speed and aperture of each frame in the roll, you should use these fixed values for exposure and mask for scanning all frames on the roll of film. Once you have the exposure and mask values fixed, you can scan the whole roll of film with these values. If you're using the same lighting for all the frames on the roll (or a subset of the frame), you can lock the color balance by scanning the brightest frame in the series and then turning off the "Auto black point" and "Auto white point" options. This will lock the black and white points for the scene, and will produce consistent colors for all the frames in the series. This is also useful if you're scanning panoramic scenes that have all been taken with the same lighting, shutter speed and aperture or if you're scanning a series of studio shots taken with the same lighting, shutter speed and aperture." I follow this advice and don't seem to have the problem you are experiencing. You may also try changing the color balance on the Color Tab between White Balance and Auto Levels. Hope this helps. Bruce Dayton Sunday, December 16, 2001, 2:56:28 AM, you wrote: FJW> I very recently tried this film, based on what I read earlier on this list. FJW> I have used it mainly inside with flash fill-in, but some shots outside as FJW> well. I really like this film, it shows very nice with portraits. FJW> I also tried to scan it with my ACER Scanwit2720S and Vuescan. Most scans FJW> have a magenta cast, that can be corrected somewhat in PhotoShop, but at the FJW> expense of for instance the hair of my subject victims. I have scanned those FJW> shots with the original driver, and they came out much better to my FJW> surprise. I did use the Portra 160NC setting in Vuescan, for the original FJW> driver I used Kodak 100-5 or so, it doesn't have many settings, and FJW> certainly not one for Portra. FJW> Does any of you have experience with scanning Portra while using Vuescan? FJW> Frits W�thrich FJW> - FJW> This message is from the Pentax-Discuss Mail List. To unsubscribe, FJW> go to http://www.pdml.net and follow the directions. Don't forget to FJW> visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
