The Lhires III spectrograph micrometer was adjusted in increments of 0.50 while taking spectrum images of the gas tube.

There is about 50% overlap of the images when using micrometer increments of 0.50 and using the Sony NEX-6 camera.

If there is an emission line in the center of the image then in the previous smaller micrometer setting it will be in the right side of the image and the following larger micrometer setting it will be in the left side of the image.

The short wavelengths are on the left side of the spectrum image and the longer wavelengths are on the right side of the spectrum image.

Micrometer setting 13.0 is the shortest wavelength, larger micrometer settings are the longer wavelengths.

The Sony NEX-6 camera sensitivity decreases in the blue short wavelengths and in the red long wavelengths.

The below images are vertically cropped and they are resized 25% of the full size image.

Lhires III Micrometer Setting 13.0

• Spectrum span estimate ~423 Angstroms, ~3936 to ~4359 Angstroms
• Sony NEX-6 camera blue sensitivity cutoff limits the spectrum in the blue short wavelengths.

Lhires III Micrometer Setting 13.5

• Spectrum span estimate ~422 Angstroms, ~4115 to ~4537 Angstroms

Lhires III Micrometer Setting 14.0

• Spectrum span estimate ~423 Angstroms, ~4290 to ~4713 Angstroms

Lhires III Micrometer Setting 14.5

• Spectrum span estimate ~423 Angstroms, ~4452 to ~4875 Angstroms

Lhires III Micrometer Setting 15.0

• Spectrum span estimate ~423 Angstroms, ~4615 to ~5038 Angstroms

Lhires III Micrometer Setting 15.5

• Spectrum span estimate ~423 Angstroms, ~4777 to ~5200 Angstroms

Lhires III Micrometer Setting 16.0

• Spectrum span estimate ~423 Angstroms, ~4935 to ~5362 Angstroms

Lhires III Micrometer Setting 16.5

• Spectrum span estimate ~423 Angstroms, ~5102 to ~5525 Angstroms

Lhires Micrometer Setting 17.0

• Spectrum span estimate ~423 Angstroms, ~5264 to ~5687 Angstroms

Lhires III Micrometer Setting 17.5

• Spectrum span estimate ~423 Angstroms, ~5426 to ~5849 Angstroms

Lhires Micrometer Setting 18.0

• Spectrum span estimate ~423 Angstroms, ~5588 to ~6011 Angstroms

Lhires III Micrometer Setting 18.5

• Spectrum span estimate ~423 Angstroms, ~5751 to ~6164 Angstroms

Lhires Micrometer Setting 19.0

• Spectrum span estimate ~423 Angstroms, ~5913 to ~6336 Angstroms
• No strong emission lines detected.

Lhires III Micrometer Setting 19.5

• Spectrum span estimate ~423 Angstroms, ~6075 to ~6498 Angstroms

Lhires III Micrometer Setting 20.0

• Spectrum span estimate ~423 Angstroms, ~6238 to ~6661 Angstroms

Lhires III Micrometer Setting 20.5

• Spectrum span estimate ~423 Angstroms, ~6400 to ~6823 Angstroms

Lhires III Micrometer Setting 21.0

• Spectrum span estimate ~423 Angstroms, ~6562 to ~6985 Angstroms

Lhires Micrometer Setting 21.5

• Spectrum span estimate ~423 Angstroms, ~6725 to ~7148 Angstroms

Lhires III Micrometer Setting 22.0

• Spectrum span estimate ~423 Angstroms, ~6887 to ~7310 Angstroms

Lhires III Micrometer Setting 22.5

• Spectrum span estimate ~423 Angstroms, ~7049 to ~7472 Angstroms

Equipment Configuration

• YouTube Video: Shelyak Instruments Lhires III, Celestron C5 telescope & Sony NEX-6 camera
• Lhires III stellar configuration
• Edmund Scientifics
  • Spectrum analysis spectrum tube neon
  • Spectrum analysis power supply 115V, intem number: 3060906
  
  

  Image Processing Software

  • Adobe Photo Shop CS5 to vertically crop and resize 25% JPG spectrum images
  
  

  Sony NEX-6 Camera Image Information

  • Image exposure: 4 seconds each
  • Image size: 4912 x 2760
  • ISO: 3200
  • White balance: Daylight
  • Creative Style: Standard
  • Contrast: Normal
  • Saturation: Normal
  • Sharpness: Normal
  • DRO / Auto HDR: Off
  • Manual Focus Assist: On
  • Color space: sRGB
  • Release without lens: Enable
  • Long Exposure NR: On
  • High ISO NR: Normal
  • Custom Key Settings: Soft key B Setting: MF assist
  
  

  

  • Wikipedia neon
  • NIST neon
  • Spectra of Gas Discharges Joachim Koppen Strasbourg/Illkirch/Kiel