Effective resolution calculator full#
Effective resolution calculator iso#

This is called sharpening, and is how we get digital images to fool the eye into thinking they're sharp.ĭigital cameras never resolve their rated resolution. Often the finest medium details to which the digital camera is sensitive are boosted in contrast. Film records fine and coarse details naturally, while digital (and video) tend to record medium details more strongly than film, but have no response to the extremely fine details which film can record. This is one way film and digital look so different. Finer details simply disappear, or become aliases.

Effective resolution calculator full#

With digital cameras, you get full contrast up to the very highest limit of the sensor's resolution. They are usually only comparing scans of film to digital. When laypeople compare film to digital, they aren't comparing film to digital. There is no response to details finer than the resolution of the scanner, even if it's on the film and visible in optical prints. When you scan film, good scanners resolve right up to their DPI (dots or pixels per inch) rating.įilm scans also have complete RGB color information and resolution at each pixel.įilm scans resolve detail about as well as the original film, up to the resolution of the scanner. This natural response is similar to our eyes, and another reason film looks so good.

Seen as an MTF curve, film's response to detail gradually becomes less as the details get finer.įilm can resolve insanely fine details, but not with as much contrast as coarser features. With film, you have complete R, G, and B resolution at every point.įilm's sharpness decreases gradually as the pitch (spatial frequency of fineness of detail) increases. With film, you get the same resolution at color transitions (green/magenta, for instance) as you get for light/dark transitions. With film, the image is continuous in all three dimensions: x, y, and z (intensity).

Effective resolution calculator iso#

The best comparison I've seen is ISO 100 film compared to 10MP. There is no one answer, because film doesn't have to bother with pixels.

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