連卡式點解用得球面鏡你都冇勇氣去了解嗎?
巨大遮擋造成的成像影響你能置之不理嗎?
光學平面副鏡不貴了嗎?
當我提出基礎的光學問題後就話不談學術
我用卡鏡出左更短的圖先話要指定用F4.5 parabolic
我一心只想鼓勵你多考慮不同光學問題,
然而回應我的只有一直在搬的龍門,
深入探討更是無從說起!
這樣的討論恐怕亦了無養份矣!
那就此作罷!
「大牛裁半行動」(40厘米口俓F4.5,兩米身長縮致80厘米)
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- 夸克星
- 文章: 3847
- 註冊時間: 週四 09 10月, 2003 21:06
Re: 「大牛裁半行動」(40厘米口俓F4.5,兩米身長縮致80厘米)
Dears,
I don't understand why you need to fold a 16 inch f/4.5 telescope.
Folding Newtonian is nothing new and had been existing since long ago but they just appear in small aperture. Anything larger than 6 inch aperture is non practical due to the exceedingly large size of the plane mirror required. If you insist on the project you should first find a flat with diameter bigger then 8 inches on the market before anything real could happen.
I belief that you will soon discover that buying such a big flat is a super hard job.
I don't understand why you need to fold a 16 inch f/4.5 telescope.
Folding Newtonian is nothing new and had been existing since long ago but they just appear in small aperture. Anything larger than 6 inch aperture is non practical due to the exceedingly large size of the plane mirror required. If you insist on the project you should first find a flat with diameter bigger then 8 inches on the market before anything real could happen.
I belief that you will soon discover that buying such a big flat is a super hard job.
Re: 「大牛裁半行動」(40厘米口俓F4.5,兩米身長縮致80厘米)
今天有幸拜讀諸位高論,穫益良多,唯各持己見,實難有結果。
國内有一句名句:“实践是检验真理的唯一标準”
MANDII君如果要證明他的論據的真確性和可行性,最簡單就是造一個實物來做測試,是龍是蛇立見高下。
各位意下如何?
國内有一句名句:“实践是检验真理的唯一标準”
MANDII君如果要證明他的論據的真確性和可行性,最簡單就是造一個實物來做測試,是龍是蛇立見高下。
各位意下如何?
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