Thread: Galaxy AP, minimum FL required?
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Old 25-09-2017, 09:08 PM
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Merlin66 (Ken)
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Just to finish the OT discussion...
SBiG no longer manufacture spectrographs...
The current commercial Littrow instruments (Shelyak) are optimized for f10.
The point was regards the FWHM size of the target star image in long focal length instrument.
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