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iOptron’s 800mm (approx. 7.9") f/4 Newtonian optical tube assembly (OTA) with a fast F/4 focal ratio is perfect for imaging deep-sky objects with a...
View full detailsThe iOptron® Photron™ Ritchey-Chretien design telescopes, feature low thermal expansion quartz primary and secondary mirrors with 93-96 percent ref...
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