Forums Comets C/2020 F3 (NEOWISE) Spectrum

Mike Harlow

Hi Robin,

I did try a transmission grating spectrum this morning just for fun. Maybe shows the image of the tail in sodium light???  A bit faint but I’ll try again next time I get the chance.  Larger image on my members page,


Details: Thor labs 300l/mm transmission grating in front of 55mm lens on un-modified Canon 550D DSLR.