393.02nm Photospheric neutral iron - filaments are visible at this wavelength
Taken by Apollo Lasky on August 6, 2025 @ NAperville, IL
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HEre is the data directly from the US government national industrial standards for the wavelength identification of neutral iron at 393.02nm with a realtive intensity of 1150000. This is easily visible on an SHG. Prove me wrong-
Photographer's website:
https://physics.nist.gov/cgi-bin/ASD/lines1.pl?spectra=fe&output_type=0&low_w=392.5&upp_w=393.5&unit=1&submit=Retrieve+Data&de=0&plot_out=0&I_scale_type=1&format=0&line_out=0&en_unit=0&output=0&bibrefs=1&page_size=15&show_obs_wl=1&show_calc_wl=1&unc_out=1&order_out=0&max_low_enrg=&show_av=2&max_upp_enrg=&tsb_value=0&min_str=&A_out=0&intens_out=on&max_str=&allowed_out=1&forbid_out=1&min_accur=&min_intens=&conf_out=on&term_out=on&enrg_out=on&J_out=on
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