m42_oiii_00021_dw.fits  Exposure: 128.0   FILTER: O_III_501/3
 m42_oiii_00016_dw.fits  Exposure: 128.0   FILTER: O_III_501/3
 m42_oiii_00022_dw.fits  Exposure: 128.0   FILTER: O_III_501/3
 m42_oiii_00023_dw.fits  Exposure: 128.0   FILTER: O_III_501/3

 m42_sii_00014_dw.fits   Exposure: 128.0   FILTER: S_II_672/2
 m42_sii_00019_dw.fits   Exposure: 128.0   FILTER: S_II_672/2
 m42_sii_00024_dw.fits   Exposure: 128.0   FILTER: S_II_672/2
 m42_sii_00025_dw.fits   Exposure: 128.0   FILTER: S_II_672/2

 m42_rc_00015_dw.fits    Exposure: 128.0   FILTER: RC_645/5
 m42_rc_00020_dw.fits    Exposure: 128.0   FILTER: RC_645/5
 m42_rc_00026_dw.fits    Exposure: 128.0   FILTER: RC_645/5
 m42_rc_00027_dw.fits    Exposure: 128.0   FILTER: RC_645/5

 m42_ha_00018_dw.fits    Exposure: 128.0   FILTER: H_a_656/3
 m42_ha_00013_dw.fits    Exposure: 128.0   FILTER: H_a_656/3
 m42_ha_00012_dw.fits    Exposure: 8.001   FILTER: H_a_656/3

 m42_clr_00017_dw.fits   Exposure: 128.0   FILTER: Clear