luke main Posted June 10, 2003 Share Posted June 10, 2003 Hi alljust a quick question, has anyone out there experimented with underexposing fuji 400 and how were the results. I found that my colours were quite rich, without sacrificing skin tone. Also would it be better to underexpose the film or increase the iso one setting and what is the ratio of over and underexposure in relation to increasing and decreasing iso? Link to comment Share on other sites More sharing options...
Rick Waller Posted June 10, 2003 Share Posted June 10, 2003 I can't speak for all fuji 400, but I can assure you that Fuji NPH rated at 320 (overexposed) yields far better results than it does rated at 400. In my experience, most if not all print films respond better to overexposure than underexposure. You weren't talking about Provia 400 were you? Link to comment Share on other sites More sharing options...
briany Posted June 10, 2003 Share Posted June 10, 2003 <i>Also would it be better to underexpose the film or increase the iso one setting </i><br> These are the exact same thing.<br> A doubling/halving of film speed is a stop. So shooting a 400 film at 800 is the same as underexposing a stop, eg., using a shutter speed of 1/250 when 1/125 is appropriate. Link to comment Share on other sites More sharing options...
chuck_jones1 Posted June 10, 2003 Share Posted June 10, 2003 Luke, I'm only a student of photography not an expert. I don't think underexposing print film works the same as with slide film. Coincidently, today I experimented with underexposing fuji superia extra 400 print film. My intent is to determine how well I can use only fuji NPH 400 or superia extra 400 for daylight. I wanted to know the effects of intentionally underexposing by manually setting the ISO to 800 (one stop). It sticks in my brain that John Shaw writes that when he used Kodachrome 25 film he set his ISO meter to 50. When he used Kodachrome 64, he set his ISO meter at 125. He did this to "Reduce exposure by one stop." In these cases, Shaw did not push process. So, I wondered what would happen if I underexposed fuji 400 speed print film by one stop the way John Shaw underexposed Kodachrome 25 slide film. My results? Only two scenes/subjects are correctly exposed- these are the two brightest scenes. The other 22 frames are not correctly exposed. I sent the film to an 1-day developer whose operators care about getting usable prints. There was no push processing. I'll leave it to experts to determine *why* my prints are not correctly exposed. They just are. Chuck Jones Link to comment Share on other sites More sharing options...
James G. Dainis Posted June 10, 2003 Share Posted June 10, 2003 Generally, when shooting slides for prints it is better to underexpose to reduce the density and contrast. An interneg or mask may not then be needed. Maybe that is what Shaw was up to. James G. Dainis Link to comment Share on other sites More sharing options...
ted_marcus1 Posted June 11, 2003 Share Posted June 11, 2003 <p>Slightly underexposing slide film can often make the color more saturated and "richer." This was (and is?) an old trick for increasing the saturation of Kodachrome. <p>Unlike slide film, the lightness or darkness of prints from color negatives is determined solely in the printing process. Underexposure will only give you weak, muddy color, low contrast, and gray, grainy shadows. It's best to expose negative film normally (i.e., meter for the shadows) and then ask for a darker print if the first print is too light or washed out. <p>Overexposure-- within reason-- actually reduces grain and improves saturation, which is why some people purposely rate color negative film at a lower speed than what's on the box. But there's <i>never</i> any benefit from underexposing a color negative. Don't do it! Link to comment Share on other sites More sharing options...
luke main Posted June 11, 2003 Author Share Posted June 11, 2003 Yeah, thankyou for your help. I had always thouht the same thing about overexposing neg film. The reason i wanted to know about underexposure is because of a roll i shot only last week. It was fuji superia 400 and i stepped the iso down to 320 the next film i loaded i forgot to step the iso down and when i got them both back the first film had prints that were occasionally way to bright and none of them had great colour. The second film had strong deep colour and none of the prints were too bright and none were too dark??? Any thoughts? Link to comment Share on other sites More sharing options...
ashton Posted June 11, 2003 Share Posted June 11, 2003 Rating Fuji Superia 400 at 400 - as you did with your second film - is *not* underexposing... (rating it at 320 - as you did with your first film - *is* overexposing.) With some print films, the effects of overexposing can be desirable, but many/most films work best at their rated speed. Link to comment Share on other sites More sharing options...
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