Sonic 25 Black and White Negative 35mm Film

FPP Sonic 25 B&W Film — a distinctive stock for building a standout portfolio

The gist: A niche, ISO 25 orthochromatic film that gives a freelance or hobbyist photographer a genuinely distinctive high-contrast look to differentiate a portfolio — at the cost of a learning curve.

• ISO 25, 24 exposures: a slow, fine-grain stock originally manufactured for optical sound recording, not everyday shooting.
• Blue-sensitive, ortho rendering: tones shift differently than standard panchromatic film, producing a look you won’t get from a preset or filter.
• Needs bright, even light: a documented film review recommends exposing at EI 6–12 instead of box speed for consistent results.
• Developer-sensitive: Kodak D-96 is recommended over HC-110 or Rodinal for the most consistent mid-tones.

Film photographer Alex Luyckx’s published review found the results “high-contrast, sharp, and no grain at all,” with well-exposed rolls showing “excellent mid-tones,” while cautioning it “requires bright or well-reflected light” and careful developer selection.

Best for: photographers building a creative side business who want a signature analog look worth testing. Skip it if: you need dependable, repeatable results for paid client work — this stock needs practice first. Runs ~$8 — check the current price before buying.