Some high-speed black-and-white films, such as Ilford Delta, 3200 and Kodak T-MAXd P3200, are marketed with film speeds in excess of their true ISO speed as determined using the ISO testing method. For example, the Ilford product is actually an ISO 1000 film, according to its data sheet. The manufacturers do not indicate that the 3200 number is an ISO rating on their packaging. Kodak and Fuji also marketed E6 films designed for pushing (hence the P prefix), such as Ektachrome P800/1600 and Fujichrome P1600, both with a base speed of ISO 400.
Alonso, A film having ISO 3200 is exactly twice as sensitive to light as one having ISO 1600. So, you can take a meter reading using ISO 1600 and then reduce the aperture 1 n"stopl" from what was indicated by the meter, or alternatively increase the shutter speed two fold. What you will be doing effectively is taking the picture with exactly half as much light with the ISO 3200 compared with your meter 's indication at ISO 1600. DavidGreg Jansen , Jun 22, 2007; 02:46 a.m.
DELTA 3200 PROFESSIONAL is an ultra-speed black and white film, ideal for fast action and low light photography such as night time, sport, or indoor architectural applications where flash photography is 'forbidden'. This is a genuine high speed film with an ability to record highlight detail that sets it apart from other films. ILFORD DELTA 3200 PROFESSIONAL has many strengths, most notably its liberating high speed, unobtrusive grain structure and its unsurpassed tonality.
Overall, the 3200 film pushed to 6400 is a bit too much. I like grains, but too much can make the images look fuzzy, especially the Affliction shots because it was far. My two passions in life are MMA and photography. Being able to do both in one night was an awesome experience. While the MMA pics came out fuzzy, the portraits came out fairly well because the subject was big enough not to break apart due to grains. It was a good experiment, and it can work for a photographer depending on the subject matter. For my next experiment, Iu’ve decided to push a Tmax 100 to 800. ThatI’s a big push, wel’ll see what happens once I get the film developed.