Shelyak Instruments Star Analyser Filter

The Star Analyser acts as a diffraction grating, splitting the light from stars into a spectrum. By installing it in your imaging train, you can capture the spectral fingerprint of a star, which reveals its chemical composition and temperature rather than just a simple point of light.

Yes, it is designed with a low-profile 1.25-inch cell specifically to fit into standard filter wheels or eyepiece holders. Its compact design ensures it won't cause vignetting in most typical setups.

Not at all. It is compatible with a wide range of astro-imaging cameras, including standard DSLRs, mirrorless cameras, and dedicated astronomy CCD or CMOS cameras. As long as your camera can mount to your telescope, you can use this filter.

The 200 lines/mm density is an excellent starting point for beginners. It provides a low-resolution spectrum that is bright and easy to capture, making it ideal for learning the basics of stellar spectroscopy without needing an overly complex or expensive setup.

You can use it for both. While it is highly popular for capturing spectral images with a camera, you can also thread it into an eyepiece to visually observe the spectra of bright stars directly through your telescope.

Blazing in the first order means the grating is optimized to concentrate the majority of the light into a single spectral order. This results in a much brighter and cleaner spectrum, which is crucial for getting usable data from fainter objects.