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double-lens ED refractors or even achromatic lenses
and optional color or nebula filters enhance contrast and detail for astronomical observations
a centrally located focusing wheel and diopter adjustment capability
In this autobiography Mike provides a very personal story of his journey through the Universe
ED80-FCD100 Air-Spaced Triplet Refractor Telescope with iEXOS-100-2 PMC-Eight Equatorial Tracker System and Field Flattener Aperture_2. 40mm - 52mm double-lens ED refractors or evenAn ideal choice for astrophotography, this bundle includes Explore Scientific's time tested FCD100 Series 80 mm Air Spaced Triplet Refractor, the iEXOS 100 GoTo mount powered by the revolutionary PMC Eight tracker system, a field flattener and 2 extra counterweights. The 80 mm aperture allows more light to collect onto your camera sensor than telescopes with smaller apertures. For example, it gathers 1. 3 times more light than a 70 mm telescope, 1. 8
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