Collimation Cassegrain ASA/Keller |
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The ASA/Keller Cassegrain had been collimated by taking advantage of the Gryzbowski collimator, a Chesire collimator, a barlowed Laser collimator (adjustment of secondary mirror) and finally by a real star test at the sky (adjustment of primary mirror)... |
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Gryzbowski colli centralized on Secondary... |
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4 LED projection around Secondary Centercross |
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Chesire view |
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Startestpattern extrafocal |
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The intrafocal pattern of the star test looked equal to the extrafocal one ;-) |
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Flat after centering the optical elements |
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30 sec exp in focus |
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