 Marie |
Film speed I like to take pictures orf wildlife and macros of flowers and insects. What film speed would give me the sharpest enlargements? I usually use a 100-400mm Canon Af lens and a 90mm Tamron macro lens. Thank you Marie
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Andy |
In general, 100 speed film produces the best enlargements and anything over 400 speed may not be as good. If you intend to make enlargements bigger than 8x11, I would stay with the 100 speed film. Although there may be exceptions. I suggest you go to Kodak or Fuji's web site and browse their product listings. You may find something which is fast and good for enlargement. Other basic requirements for sharp images are tripod and shutter release. Hope this helps.
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Marie |
Thanks, Andy. I will try what you suggested. Marie
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John A. Lind |
Embellishing on Andy's response . . . Resolving power of film varies. In general, the slower the speed, the higher the resolution. This is particularly true in families of films, such as Kodak Gold 100 compared to Gold 200 or Gold 400 (now Gold Max). However, Kodak's Portra 400NC, Portra 400VC, and Supra 400, all professional films, have a significantly better print grain index (PGI) than Kodak Gold 100! So does the "high end" consumer film, Royal Gold 400. Gold 100 (now called "Bright Sun Film") is very nearly as grainy as the Portra 800 and Supra 800. PGI is Kodak's wacky "graininess" comparison system for color negative film that nobody else uses. Conclusion: For films other than Kodak's color negatives (including Kodak's B/W and slide films), the diffuse rms granularity figure and MTF curve show how fine grained the film is and what to expect in apparent sharpness. Particularly applicable to "apparent sharpness" as perceived by the human eye is the MTF curve. However, it's not the far end of the curve that's important. For apparent sharpness as perceived by the human eye, it's how high the curve is for the "middle" numbers from about 20 to 60 line pairs per millimeter. The higher the curve through this region, the more a human will perceive it as having greater sharpness! -- John
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