H-alpha Spicerack mod. tz4s + ls50tha
Taken by Apollo Lasky on June 29, 2025 @
Naperville, il
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Camera Used: samsung Galaxy S25 Ultra
Exposure Time: 7343/40000000
Aperture: f/1.7
ISO: 80
Date Taken: 2025:06:29 15:39:42
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Details:
Removed the collimator section from a lunt hydrogen alpha ls50tha pressure tuned etalon and replaced it with a baader planetarium tz4s for a customer. This allows greater magnficiation and direct integration into a 100mm x 1000m0 telescope with a 2" focuser. Although there is a 4x barlow affect added by the tz4s; there is a 175mm plano convex optic in the beack end of the etalon so it now functions as a reduced 2300mm focal length at the eyepiece. The standard lunt blocking filter is threaded directly to the back of the etalon for safety.
Photographer's website:
No URL provided.
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