我果支系F4.5唔系F5!XR250 寫:其實我見過jj12667枝10" F5牛頓鏡,用玻璃纖維做鏡筒,其實都已經好輕好硬。
鋁筒或碳纖筒
Thanks, Peter! Do you know of similar sources in China?Tan14 寫:Check this site for CF tubes (up to 8") and please also check your wallet:
http://www.carbon-tube.com/round.php
Actually I think the prices are not too radiculously high. But of cause, shipping will add significantly to it. And we really need larger sizes for telescope making...
This company in USA can provide CF tube up to 21" diameter ...
For such company in China, I have no ideas at this moment.
http://www.nimcor.com/carbon_tubes.html
For such company in China, I have no ideas at this moment.
http://www.nimcor.com/carbon_tubes.html
誰在線上
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