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Rosco 3410 Cinegel Sun 1/8 CTO Color Correction Filter 20x24 — main product image
Rosco

Rosco 3410 Cinegel Sun 1/8 CTO Color Correction Filter 20x24

★★★★★4.6 (23 reviews)

Dial in that golden-hour warmth in the studio — Rosco's 1/8 CTO nudges daylight sources to a flattering 4900°K without sacrificing output.

$17.99*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Rosco Cinegel 1/8 CTO is the filter you reach for when the correction needed is almost invisible — but unmistakably right. On portrait sessions where strobes read a touch cold against window light, or on video setups where skin tones need a whisper of warmth to feel natural on camera, this filter bridges the gap between clinical accuracy and inviting light. It's a staple in color correction kits for precisely the shoots where you can't afford a color cast to announce itself: editorial beauty, commercial product work, and any scene where mixed sources need to read as a unified whole.

Cut from Rosco's Cinegel stock, the filter is deep-dyed through the material rather than surface-coated, which translates directly to durability on real sets. It doesn't bubble under sustained heat, it cuts cleanly without fraying, and the 20×24" sheet scales to any fixture — from a large Fresnel frame down to a small strip for a rim light. At 92% transmission, the filter is essentially invisible in your exposure math, making it easier to integrate without reworking your lighting ratios. It's the kind of consumable that earns a permanent spot in the bottom of a lighting bag.

Key Features

OPTIMIZED COLOR - Rosco Cinegel 1/8 CTO ensures accurate color correction, subtly warming your light for natural skin tones and balanced scenes, enhancing overall image quality.

SUPERIOR DURABILITY - Crafted for demanding film sets, this robust lighting filter withstands high temperatures without fading or warping, ensuring consistent performance throughout long shoots.

EXCELLENT TRANSMISSION - Rosco's advanced formula provides minimal light loss, maintaining brightness while effectively modifying color, crucial for achieving desired lighting effects efficiently.

GENEROUS SIZE - The 20x24" sheet offers ample coverage for various lighting fixtures, easily cut and adapted to fit smaller lights or create custom shapes, maximizing versatility.

SIMPLE INTEGRATION - Lightweight and easy to handle, the Rosco Cinegel filter can be quickly applied and removed, streamlining your workflow and saving valuable time on set or in the studio.

Specifications

Product Type
Color Correction Filter
Model
3410 Cinegel Sun 1/8 CTO
Color Correction Strength
1/8 CTO
Dimensions
20x24 inches
Durability Feature
Withstands high temperatures without fading or warping
Light Transmission
Minimal light loss

Pros & Cons

👍 Pros

  • Barely-there 92% transmission means you can warm your source without sacrificing strobe power or bumping ISO on location.
  • The deep-dye construction holds its color calibration session after session — no fading after repeated use under hot fixtures.
  • A single 20×24" sheet gives you enough material to gel multiple modifiers or cut custom shapes for awkward fixtures.
  • The subtle +20 mired shift is precise enough to blend daylight and tungsten sources in mixed-light environments.
  • Lightweight and dead-simple to use — cuts to size cleanly and sits flat in a gel frame without bubbling or creasing.

👎 Cons

  • At 1/8 strength, the warming effect is invisible to the naked eye on set — you won't confirm the shift without a color meter or careful RAW review.
  • A single flat sheet offers no protection from wind on outdoor locations; you'll need gel frames or tape to secure it reliably.
  • No storage tube or protective sleeve included — the large sheet can crease in a gear bag if not stored carefully.
  • Not suitable as a standalone CTO solution when a larger color temperature conversion is needed; you'll need to stack multiple sheets.

Frequently Asked Questions

It shifts daylight from 5500°K down to approximately 4900°K — a +20 mired shift. Transmission is 92%, so you lose less than a third of a stop. In practical terms, you can dial it in without compensating much on your strobe power.
Yes. The 20×24" sheet is designed to be cut with scissors. It holds a clean edge without fraying, so you can size it to a gel frame, tape it to a fresnel, or cut strips for speedlights.
A full CTO converts daylight to tungsten (roughly 3200°K), which is a dramatic shift. The 1/8 is for subtlety — warming up a slightly cool strobe, blending a mixed-source scene, or adding a touch of skin-flattering warmth without pushing the scene orange. It's the finesse tool in a color correction kit.
Rosco Cinegel is rated for high-temperature continuous sources. It's deep-dyed rather than surface-coated, so it resists fading and won't delaminate under sustained heat. That said, for extremely close placement on a hot tungsten par, use a gel frame to maintain airflow.
No. The 1/8 CTO is a clean conversion filter with 92% transmission and no color cast outside the intended mired shift. It won't muddy your highlights or introduce a green push — what you get is a natural, accurate warm shift.

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