外國DIY蜂巢主鏡胚

[Wah!!]

http://www.mdpub.com/scopeworks/hexagons/index.html

[bingsze]

外國鏡神！

[Chanlunlun]

But..................after all these complicated and expensive procedures, the final product still weighs heavier than 1 inch glass blank of same diameter.

[Wah!!]

The weight can be reduced further if the thickness of the edges become thinner.
Also, weight is not the only consideration of a mirror.

[tele2002]

谢谢楼主发帖。

[Wah!!]

香港估計沒有私人有此條件玩熔玻璃制鏡呢...

[tele2002]

电炉丝和耐火土都很便宜好找，电费几角钱1度，似乎难度不大啊？

[Wah!!]

电炉丝和耐火土都很便宜好找，电费几角钱1度，似乎难度不大啊？

香港生活最大的成本是房子.
房子都很小, 不會有很多人有柴房後院之類的地方可建這個爐.
能有這麼大的房子的天文愛好者, 一般都直接買器材用, 少玩DIY.