Optolong CLS-CCD Clip Filter Canon EOS APS-C: suppress light pollution from within the body
You click a clip-filter into the camera body in seconds, directly in front of the sensor. Then you simply mount your lens or telescope adapter: the filter protects the sensor and filters every image you take. This CLS filter (City Light Suppression) blocks the disruptive emission lines of street lighting, while allowing the light from nebulae and galaxies to pass through.
The result under a city sky: a darker background, more contrast, and longer usable exposure times before light pollution overwhelms the image.


Click and shoot
The filter is installed and removed without tools and does not affect camera functions. Please note for Canon APS-C: EF-S type lenses extend too far into the body with their rear lens and cannot be used with a clip filter. EF lenses and telescope adapters work without limitation.
For astro-modified cameras
This CLS-CCD version blocks infrared light in addition to light pollution. This makes it the right choice for astro-modified cameras from which the internal IR-blocking filter has been removed: color balance and sharpness are maintained.
Featured accessories
For darker skies or nebula photography with more contrast, the Optolong UHC clip or an L-series filter is the next step.
For whom yes and for whom no
- ✓ Deep-sky photographers shooting from the city or outskirts
- ✓ For those who want to continue using any lens without modification
- Owners of unmodified cameras: the standard CLS version is then sufficient
Specifications
| Type | CLS-CCD clip filter (light pollution) |
| Camera system | Canon EOS APS-C |
| Placement | In the camera body, in front of the sensor |
| IR Blocker | Yes |
| Observation goals | Deep-sky photography under a light-polluted sky |
You can find more accessories for this merk at the Optolong merk page.







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