Revolog Rasp vs Kosmos: Which Special Effect Film?
By Firstcall Photographic | Published: 2026-10-23
Category: Comparisons
Compare Revolog Rasp and Kosmos special effect films for 35mm. See how their effects differ, when each shines, and which one fits your creative style.
Quick answer
Choose Revolog Rasp if you want bold, unpredictable streaks that cut across your frame; choose Revolog Kosmos if you prefer a dreamy cosmic backdrop with subtle stardust and nebula-like detail.
Effect style and visibility
The two films create very different looks. Rasp produces coloured lines that run sideways in landscape shots or down in upright shots, while Kosmos adds extra-terrestrial lines and dots that mimic a cosmos sky. Rasp's effect is more graphic and directional; Kosmos is more textured and ambient.
Both effects are more visible in darker parts of the image. If you shoot in bright, even light, the effect may be less obvious. For maximum impact, underexpose slightly or include shadow areas in your composition.
Exposure latitude and creative control
Rasp's effect is not changed by exposure, so you get consistent streaks no matter how you meter. Kosmos, however, responds to exposure: the blue nebulas are more visible in darker parts, giving you more creative control. If you like to experiment with exposure, Kosmos offers more room to play.
Both films are ISO 400 colour negative films with 36 exposures, so they handle a range of lighting conditions. But remember, the effect is baked in—there is no way to remove it in post.
Key trade-offs
- Effect style: Rasp gives bold, directional streaks; Kosmos gives a subtle, all-over cosmic texture. Think about whether you want a graphic or ambient look.
- Exposure sensitivity: Rasp is exposure-independent; Kosmos reacts to exposure, especially in shadows. If you like to experiment, Kosmos offers more control.
- Subject suitability: Rasp suits landscapes and architecture where lines add energy; Kosmos suits portraits and creative shots where a cosmic backdrop enhances the mood. Match the film to your typical subject matter.
Product facts
- Revolog Rasp - 35mm 36Exp: Rasp shows coloured lines that run sideways in landscape format or down in upright format; exposure does not change the effect, but lines are more visible in darker parts. You get consistent, graphic streaks regardless of metering, making it predictable for planned shots.
Revolog Rasp - 35mm 36Exp - Revolog Kosmos - 35mm 36Exp: Kosmos adds extra-terrestrial lines and dots for a cosmos effect; blue stardust creates little galaxies, and the blue nebulas are more visible in darker areas. Exposure directly shapes the effect, so you can dial in more or less cosmic detail by adjusting your settings.
Revolog Kosmos - 35mm 36Exp
Which should you choose?
Best for
- Photographers who want bold, graphic streaks that are easy to predict
- Landscape and urban shooters looking to add directional energy
Not for
- Those who prefer a subtle, ambient effect over an in-your-face pattern
- Shooters who want to control the effect through exposure
