AD-58 DSLR Adapter
Mount any 1.25″ filter cell (including Star Analyser or Rainbow Optics gratings) to DSLR filter threads.
This filter fits the standard Canon 58 mm lens cap threads.
If your camera's filter threads are not 58 mm, you will need some step up or step down Adapter Rings (link).
Note: Also consider our beautiful new 24" x 36" Periodic Table of the Spectra poster (below). See this page for details: link.