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A reinforcing ring on the primary mirror
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Measuring the middle
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Side view of my telescope's primary mirror
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Cleaning the primary mirror of my telescope
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My primary mirror right after I removed it from the telescope
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Unscrewing the mirror
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The tools for aligning my telescope
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Collimating my telescope
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A properly collimated telescope
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My new laser collimater
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Using the telescope cover to trace the circle for a Hartmann Mask
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The circle on the cardboard for a Hartmann Mask
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The pieces of the Hartmann Mask
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Hartmann mask focus example
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A finished Hartmann Mask
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The Hartmann Mask on my telescope