The making of 26 inch Dall Kirkham telescope - 1, design.

[Chanlunlun]

,,,,市區光害太嚴重,,,,!!26吋會浪費他呢,,,,!!@@

This is exactly why we make big telescopes. We are experimenting to see DSO within urban area, especially in the busiest heart of our city.

You may say this is an expensive experiment, but it worths it.

[benzenechow]

市區看深空天體,,,!!^^正呀,,,!!,,,,期待計劃完成的一日,,,,!!^^加油啊,,,!!

[浩]

鏡神個設計好靚！~
好想有機會睇下呀.....@@
不過想請教一樣野.....點解eyepiece 唔放Nysmith point?
重心問題？

[Chanlunlun]

鏡神個設計好靚！~
好想有機會睇下呀.....@@
不過想請教一樣野.....點解eyepiece 唔放Nysmith point?
重心問題？

As you can see from the attached picture, the Nysmith point is too low to be practical. So we move the eyepiece to a higher position.

[浩]

有沒有可能將經軸nysmith point升高至目鏡座的位置？加重錘平衡？
那樣目鏡就不會升降了，也可裝置重型相機，甚至光譜儀？
純粹幻想~ ^^

[Wah!!]

加重錘還不如把整個底座升高?

[浩]

就是把底座升高呀，但轉軸升高會不平衡吧？
所以要加重錘?@@

[Eddy So]

很大的望遠鏡呀！

[Chanlunlun]

Fantastic redenring ! How do you do it ?

[Wah!!]

就是把底座升高呀，但轉軸升高會不平衡吧？
所以要加重錘?@@

我說的是在平衡的前題下, 把光路引至仰角軸心輸出, 由於位置較低, 所以再把整個座望遠鏡架高些. 並不需要用到平衡錘.

[Eddy So]

Fantastic redenring ! How do you do it ?

By using SolidWorks.
I am trying to build this model because my hands feel itching: