Yodica · ISO 400 Color negative

Yodica Pegasus 400

Color negative ISO 400 In production horizontal-rainbow · pre-exposed · handmade · effect-film

Pegasus lays a horizontal rainbow gradient across the frame. Where Atlas scatters colors and Andromeda lays a uniform pink wash, Pegasus is structured: a band of color runs left-to-right across each negative, with the hues blending one into the next. The effect reads almost like a hand-cranked color wipe, which makes sense because the pre-exposure step is literally a hand process.

Yodica is a Milan outfit that hand-treats consumer C-41 stock with colored light before canning it. They started doing this around 2018 and named every product after something celestial. Pegasus, Atlas, Andromeda, Polaris, Sirio: all the same base stock, all different pre-flash treatments. Pegasus rates at ISO 400 and processes in standard C-41.

The horizontal banding is most visible against neutral backgrounds. Shoot a portrait against a white wall and you will see the gradient cleanly. Shoot the same person against a busy background and the band fights with the scene. Yodica's own guidance is that the colors get more pronounced with slight underexposure. Rate it at 500 or 640 if you want the band to dominate.

No direct peer exists for the horizontal-band effect. Atlas from the same brand is the closest cousin and uses a scattered rainbow instead. Revolog films from Vienna offer comparable creative-effect overlays but with different visual signatures. If you have shot Revolog Kolor, you know roughly the texture-of-experiment to expect from Pegasus.

35mm only, 36 exposures, single roll per cartridge, no 120 option. Supply runs thin between batches.

The reciprocity exponent is 1.20. Zone Light Meter applies the correction past one second. A metered 5-second exposure becomes about 8 seconds at the negative. The colored band is engineered into the unexposed roll, so it does not shift with exposure time the way the lens-recorded image does. For long exposures you can end up with a strong band over a thin scene, which some shooters chase deliberately.

How the app handles this stock

  • Box speed: ISO 400. 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 1.20.
  • Expired film: if you load an old roll, set the expiry year and storage in the app and the ISO scales for you. Color negative decay rates are baked in.

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