Accessory

Astronomik CLS Clip-Filter EOS APS-C

Broadband light-pollution suppression (CLS) filter

Canon EOS clip-in, covers APS-C sensors

Blocks sodium and mercury vapour lines, most LED emission and airglow

Passes visible light and main nebula emission lines

Integrated IR-blocking layer

Wide passband for minimal star dimming

Fits inside the camera body, retaining autofocus and metering

Parfocal, planoptically polished glass