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In a reflecting telescope (Cassegrain), is there a difference between using a concave or convex secondary mirror? - Astronomy Stack Exchange
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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](https://i.stack.imgur.com/n80ol.jpg)
In a reflecting telescope (Cassegrain), is there a difference between using a concave or convex secondary mirror? - Astronomy Stack Exchange
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Amazon.com : Orion 10022 StarMax 90mm TableTop Maksutov-Cassegrain Telescope : Catadioptric Telescopes : Electronics
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Celestron Aluminium Advanced Vx 9.25" Schmidt-Cassegrain Telescope, 2350mm (93") at Rs 235747 in Delhi
![A Cassegrain telescope uses two mirrors as shown in above figure. Such a telescope is built with the mirrors 20 mm apart. If the radius of curvature of the large mirror is A Cassegrain telescope uses two mirrors as shown in above figure. Such a telescope is built with the mirrors 20 mm apart. If the radius of curvature of the large mirror is](https://haygot.s3.amazonaws.com/questions/421595_3dd363e6ca254d3182d8b1cafaea23f9.png)