Astronomik SII CCD

The SII filter isolates the specific light emitted by ionized sulfur atoms in deep-sky objects. By blocking out light pollution and other wavelengths, it allows you to capture the intricate, high-contrast details of nebulae that are otherwise difficult to see.

No, this specific clip-in filter is designed exclusively for Canon EOS cameras with APS-C sensors. It will not fit full-frame models, so please verify your camera sensor size before purchasing.

A 12nm bandwidth is relatively narrow, which is excellent for high-contrast imaging but does require longer exposure times compared to wider filters. You will need a tracking mount to compensate for the longer exposures needed to gather enough light.

This filter is strictly for specialized astrophotography. Because it is designed to isolate a very specific wavelength of light, it will produce extremely unnatural color shifts and is not suitable for general landscape or daytime photography.

The clip-in design sits inside the camera body, so it does not interfere with your lens's external operation. However, because it alters the light spectrum reaching the sensor, you should rely on manual focus rather than autofocus when using this filter.