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主題: Seestar S50 with Olympus 1.7x teleconverter 作者: peter 於 2025-02-23 15:29:12 Seestar S50 with Olympus 1.7x teleconverter
https://www.cloudynights.com/topic/954704-seestar-s50-with-olympus-17x-teleconverter/ 1.7 increase in focal length (250mm to 425mm) changes the focal ratio to f/8.5 |