Dear ATMs,
After fitting a finderscope and mounting plate on top the telescope the whole scope is declared to be completed.
The completion of the telescope doesn’t mean that the project is finished. In fact I will try to fit in another binocular objective lens of shorter focal length to experiment how things will change with the change of secondary mirror. This project is still going.
This new objective lens has a backside radius of curvature of 331 mm and gives a enormous f/23 ratio if fit into this Cassegrain. With such a long focal length it is possible to shoot planets in prime focus, eliminating the use of Barlow lens. Let's see how it works.
Best regards
Chan Yuk Lun
10 May 2012
DIY 7 inch Cassegrain telescope - 5, Telescope Completed.
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- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
DIY 7 inch Cassegrain telescope - 5, Telescope Completed.
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- 7 inch f/19 Classical Cassegrain on a Classical Equatorial Mount.
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
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