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Kodak 35mm RA100 Royal Gold 100 Color Negative Film Drum Scan 8000 spi dpi Kodak 35mm KR64 Kodachrome 64 Color Transparency Chrome Film Drum Scan 8000 spi dpi

Kodak Royal Gold RA100 scanned at 8000 spi

Kodak Kodachrome KR64 scanned at 8000 spi

Kodak 35mm RA100 Royal Gold 100 Color Negative Film Drum Scan 4000 spi dpi Kodak 35mm KR64 Kodachrome 64 Color Transparency Chrome Film Drum Scan 4000 spi dpi

RA100 downsampled to 4000 ppi

KR64 downsampled to 4000 ppi

Kodak 35mm RA100 Royal Gold 100 Color Negative Film Drum Scan 2000 spi dpi Kodak 35mm KR64 Kodachrome 64 Color Transparency Chrome Film Drum Scan 2000 spi dpi

RA100 downsampled to 2000 ppi

KR64 downsampled to 2000 ppi

Resolution Comparisons

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Neg Vs.

Chrome

ColorNegativeA1a1a1a

Color Negative Vs. Color Transparency

Color negative film and its grain structure require a high resolution scan to duplicate a natural result. Color transparency film is much less dependent on scanning resolution for smooth enlargement. At certain scanning magnifications, negative films (especially color) exhibit a phenomenon similar in appearance to increased grain. This is due to the aliasing between the randomized organic film grain and the structured grid of pixels. The effect is comparable to a Moiré pattern. For negative film, a sampling rate of 8000 per inch is highly recommended. This resolution will accurately describe the grains/dye clouds, thus avoiding aliasing. The alternate color negative Section A from the same negative shows less of the effect in the darker tones and how grain aliasing can vary within a single scan due to different grain sizes in different densities.

Technical Information

Rates & Sizes

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e

Color

Negative

Color

Transparency

B&W

Negative

ColorNegativeA1b1
ColorNegativeA1a2a
ColorNegativeA1a1b1

Section B

The top row contains sections of the original 8000 spi scans. Underneath are downsamples directly from the 8000 spi scan.

All sections are unsharpened and unfiltered.

All sections are displayed at actual pixel size.