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Triband-SCT - Schmidt-Cassegrain-based Multi-Purpose-Telescope, for Sun and Deep Sky - Baader Planetarium - Telescopes
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In a reflecting telescope (Cassegrain), is there a difference between using a concave or convex secondary mirror? - Astronomy Stack Exchange
![In a reflecting telescope (Cassegrain), is there a difference between using a concave or convex secondary mirror? - Astronomy Stack Exchange In a reflecting telescope (Cassegrain), is there a difference between using a concave or convex secondary mirror? - Astronomy Stack Exchange](https://i.stack.imgur.com/j0i4Y.jpg)