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My project
A Ritchey-Chretien telescope,diameter 450mm, focal 3600
Several years ago (1995-96) I made my first telescope, a Newton with a diameter of 250mm and a focal of 1200mm: it has given full satisfaction to me. At the moment, I'm trying to make a much more ambitious instrument, a Ritchey-Chretien with a diameter of 450mm and a focal of 3600mm. Of course it isn't an easy project to achieve: I've had to improve my skills in projecting, making, finishing and correcting the optical system. I've also had to improve my capability in projecting and making the mechanical structure.
Why a RC telescope?
I've decided to make a Ritchey-Chretien telescope because it has a wonderful optical system, better than many others: it's corrected both in spherical aberration and coma ( a Newton telescope, for example, isn't corrected in coma). So a RC telescope is particularly right for photography and visual observation. If you have a RC and a Newton telescope of the same diameter, you will see from 1 to 2 magnitudes more with the RC telescope. This is also less difficult to make and less expensive than a Schmidt-Cassegrain.
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