Astronomical telescope 154mm series HD objective lens focal length F750 F1000 F1200 multi-layer film single-layer film

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-3%

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-0.7%

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-9%

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-5%

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-2%

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3.0

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5.0

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5.0

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1

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-9%

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-4%

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-2%

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-7%

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5.0

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-5%

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-6%

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