Fujifilm · ISO 50 Slide

Fujifilm Fortia SP

Slide ISO 50 Discontinued extreme saturation · Japan-only release · cherry blossom

Fortia SP was a limited-run E-6 slide film Fuji produced for the Japanese market between 2005 and 2007 as the successor to the original Fortia, which had its own limited 2004 release. The SP designation marked the reformulated follow-up, not a rebadge of withdrawn stock. The SP stood for Special, applied to a stock engineered to push color saturation past Velvia 50 in directions Velvia was deliberately not going. Where Velvia exaggerates greens and reds, Fortia SP pushed magentas, pinks, and oranges toward levels that read almost cartoonish in any subject that was not actually those colors in life.

The stock was built around cherry blossom season. Sakura petals came back as a saturated coral-pink no other slide film of the era reproduced without filtration. Autumn foliage rendered with the orange-red intensity landscape shooters had previously only reached through cross-processing or aggressive post work. For the narrow subject range it was built around the look was unmistakable. For anything else it was a poor choice, because skin tones went magenta-flushed and neutral whites picked up a pink cast that did not feel intentional.

Production ran in 35mm and 120 roll film in extremely limited quantities, around 40,000 packs of 35mm and 30,000 packs of 120, sold primarily through Yodobashi Camera and a handful of Japanese retailers. Export was unofficial; most rolls reached Western photographers through eBay sellers. By 2007 the SP run had sold through and Fuji declined to continue.

Grain sat at the Velvia 50 baseline. RMS granularity was tight enough to enlarge cleanly, and the film processed in standard E-6 with no special chemistry. Latitude was as narrow as any saturated slide film. A third of a stop over clipped the highlights. A third under blocked the shadows. Bracketing was not optional.

Reciprocity exponent is 1.10. Zone Light Meter applies the correction past one second, so a 30-second meter reading lands at roughly 35 seconds at the negative. For the daylight cherry blossom and autumn work the stock was built around, the threshold rarely came up. Surviving sealed rolls trade at collector prices, all twenty-plus years past nominal expiry.

How the app handles this stock

  • Box speed: ISO 50. Picker exposes pull/push chips so you can shoot it at any speed you want and the meter follows.
  • Reciprocity: Above one second the app raises metered time to the power of 1.10.
  • Expired film: if you load an old roll, set the expiry year and storage in the app and the ISO scales for you. Slide decay rates are baked in.

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