Collimation Cassegrain ASA/Keller
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)...
Gryzbowski colli centralized on Secondary...
4 LED projection around Secondary Centercross
Chesire view
Startestpattern extrafocal
The intrafocal pattern of the star test looked equal to the extrafocal one ;-)
The seeing this night, at 20 degrees, was not 'optimal' but good enough to finish the adjustment of the primary mirror.
The first CCDInspector plot
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