Orion N 203/790 Astrograph OTA

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An optimized for photography Newton Astrograph at an affordable price! With its relatively large opening for fast focal ratio of f / 3.9 this inexpensive reflector comes close to the expensive Apochromaten. The large secondary mirror the CCD and DSLR sensors illuminates fully. The image contrast is enhanced by nine built-in tube glare rings because this scattered light trap. For this reason, the tube opening is "far ahead of the 2 - designed dual-speed Crayfordauszug and ultimately increases the matt black finish of the contrast. Both the primary and the secondary mirrors are highly reflective mirror-coated with aluminum (94%), over which a protective layer of quartz was placed. The built-in fan ensures rapid temperature adjustment of the primary mirror. Thanks to the adapter for extension tubes, this photo-Newton also very good with 1.25 - be used visually eyepieces "or 2".
Denumiri similare la Telescop Orion N 203/790 Astrograph OTA: N 203 790 Astrograph OTA, N203790AstrographOTA
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