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Peter Zetner | all galleries >> Astrophotography >> Solar Photos (pre-2014) >> Omega H-Alpha Filters >> Solar Equipment >> Optics Design and Assembly > Filter Assy 0 Complete.jpg
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25-AUG-2012

Filter Assy 0 Complete.jpg

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Date/Time25-Aug-2012 12:32:46
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Peter Zetner25-Aug-2012 18:18
The entire filter assembly. In order, from telescope objective side (L) to camera side (R), the optical elements are: 1. Baader UV/IR cut filter (ERF), 2. Collimator Lens (-150mm achromat), 3. Baader 1.25in Halpha 35nm (to block out the blue remaining in the "cyan" Ha narrowband filters), 4. Refocuser Lens (+324mmfl by combined system of -120mmfl and +100mmfl achromats), 5. Two "cyan" Ha filters in kinematic mounts for tilt-tuning. There is also a Borg-Hutech helical focuser on the camera side of the filter assembly.
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