鏡神 2015' diy QC 26" Nasmyth Dobsonian telescope 杜蘇望遠鏡

文章由 **Wongsir** » 週六 18 4月, 2015 13:04

昨天參觀 QC 開放日, 主力看看陳玉麟和QC同學們自制的 Dobson 鏡.

嘩! 親自看過才知這樣壯觀, 又大又高. 基本上是木制, 结構簡單而扎實, 鏡神透露26吋大鏡計劃祇用了二千多元, my God, 真是 Chanlunlun 的一貫作風, 以最便宜和方便的物料, 造出性價比最高的望遠鏡.

主鏡口徑 26吋, 副鏡 10吋, Nasmyth 焦點, 應該是全港最大的卡式系统望遠鏡和杜蘇鏡了.

Eddy So · 文章由 **Eddy So** » 週六 18 4月, 2015 13:08

鏡神大師真厲害！

文章由 **Wongsir** » 週六 18 4月, 2015 13:47

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文章由 **Wongsir** » 週六 18 4月, 2015 13:51

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文章由 **Wongsir** » 週六 18 4月, 2015 13:54

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文章由 **Wongsir** » 週六 18 4月, 2015 14:01

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anyone · 文章由 **anyone** » 週六 18 4月, 2015 15:50

keithsok · 文章由 **keithsok** » 週六 18 4月, 2015 16:25

[想入非非]

Steve · 文章由 **Steve** » 週六 18 4月, 2015 16:32

一柱擎天

cori · 文章由 **cori** » 週六 18 4月, 2015 17:35

Chanlunlun · 文章由 **Chanlunlun** » 週六 18 4月, 2015 17:50

Wongsir 寫: 嘩! 親自看過才知這樣壯觀, 又大又高. 基本上是木制, 结構簡單而扎實, 鏡神透露26吋大鏡計劃祇用了二千多元, my God, 真是Chanlunlun的一貫作風, 以最便宜和方便的物料, 造出性價比最高的望遠鏡.

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Thanks for WongSir's comment.

Actually the secondary mirror is a hyperboloid instead of sphere. The cost of the telesdope is increasing because the ServoCAT and Argo Navis will cost HK$18000.

The coating of the secondary mirror and primary mirror will add further 2000 to 3000 dollars

So the total cost will add up to around HK$20,000.

MIB · 文章由 **MIB** » 週六 18 4月, 2015 18:03

[水汪汪] 強

littleming · 文章由 **littleming** » 週六 18 4月, 2015 18:12

bingsze · 文章由 **bingsze** » 週日 19 4月, 2015 11:56

Don't know when the mirror get coated and start to enjoy

大黃傻貓GARFIELD

For such an aperture, it has to be Cassegrain to have the shortest tube length possible.
You have to use Dobsonian mount to keep the support at a very low cost (plus giving it the transportability).

Can it be taken apart and move to a darker location ? I think Chan Sir will have got that in his mind when designing it.

Did Chan sir "borrow" any ideas from others ?

香港天文論壇