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Amazon.com : Sarblue Maksutov-Cassegrain Telescope, Mak60 Telescopes for Kids Adults 750x60mm, Compact Portable for Travel, Beginner Astronomy Telescope with Adjustable Tripod Finderscope and Phone Adapter : Electronics
![A Cassegrain telescope uses two mirrors as shown in the above figure. Such a telescope is built with the mirrors $20mm$ apart. If the radius of curvature of the large mirror is A Cassegrain telescope uses two mirrors as shown in the above figure. Such a telescope is built with the mirrors $20mm$ apart. If the radius of curvature of the large mirror is](https://www.vedantu.com/question-sets/a18f4337-6600-4926-beeb-de7304fe92646666206574747753330.png)
A Cassegrain telescope uses two mirrors as shown in the above figure. Such a telescope is built with the mirrors $20mm$ apart. If the radius of curvature of the large mirror is
![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)
In a reflecting telescope (Cassegrain), is there a difference between using a concave or convex secondary mirror? - Astronomy Stack Exchange
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