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.
In Digital Photography ISO measures the sensitivity of the image sensor. The same principles apply as in film photography a– the lower the number the less sensitive your camera is to light and the finer the grain. Higher ISO settings are generally used in darker situations to get faster shutter speeds (for example an indoor sports event when you want to freeze the action in lower light) (– however the cost is noisier shots. I ’ll illustrate this below with two elargements of shots that I just took e– the one on the left is taken at 100 ISO and the one of the right at 3200 ISO (click to enlarge to see the full effect).
I thought I"Hey! Using 3200 ISO B&W film could be fun! " Unfortunately I wasn't sure about how much light it really needed and most of the shots were pretty underexposed. Make that very underexposed. :( I'd love to try it again at some point, but how much light do you need for such a high speed film? Early evening and lots of indoor light, or should I grab a flash? I don't have the setup yet to develop B&W myself so I'm sending this out to be developed. Example shot: That is one of the better shots. The set is here: Holga 120N 3200 ISO B&W... Thanks! Posted at 1:50PM, 21 May 2010 PDT ( permalink )
Need fast film, the fastest film available to the public? Turn to Kodak T-MAX 3200, a Black and White marvel of speed and versatility. I have used this film on a number of occasions when I need to shoot indoors or in any poorly lighted area. Most films that claim to be ISO 3200 top out at about 1250 speed at best. Only T-MAX, of the films I have used, appears to genuinely be 3200. Others films claiming to rate at that speed need to pushed to 3200 which creates larger grain. While pushing may not be an issue in slower films, it is a huge problem in fast black and white films which have more silver and thus more grain. I like grain but I also like to be able to see detail in my subjects. I don