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einfach_orangensaft, 4 godziny temu do astronomy w It pains to admit but i got Bird Jones'ed when buying my first telescope Its like a newtownian just that it has a spherical mirror (cheaper to make) and uses a corrective lens in front of the eyepeace.
Its like a newtownian just that it has a spherical mirror (cheaper to make) and uses a corrective lens in front of the eyepeace.