Coronado 大減價
Coronado 大減價
由於有其他廠嘅日珥鏡加入市埸競爭,Coronado 壹些日珥鏡開始大減價,有的雖然減咗成半,售價仍然要港幣萬萬聲,對於我等壹般業餘天文愛好者仍然好貴好貴!
Coronado PST List Price US$749 Sale price US$499
Coronado SM60T List Price US$4599 Sale price US$2499
Coronado SM90T15 List Price US$12449 Sale price US$5999
http://www.buytelescopes.com/manufacturer.asp?s=2&m=69
Coronado PST List Price US$749 Sale price US$499
Coronado SM60T List Price US$4599 Sale price US$2499
Coronado SM90T15 List Price US$12449 Sale price US$5999
http://www.buytelescopes.com/manufacturer.asp?s=2&m=69
Re: Coronado 大減價
>雖然減咗成半,售價仍然要港幣萬萬聲TONGKW 寫:由於有其他廠嘅日珥鏡加入市埸競爭,Coronado 壹些日珥鏡開始大減價,有的雖然減咗成半,售價仍然要港幣萬萬聲,對於我等壹般業餘天文愛好者仍然好貴好貴!
Coronado PST List Price US$749 Sale price US$499
Coronado SM60T List Price US$4599 Sale price US$2499
Coronado SM90T15 List Price US$12449 Sale price US$5999
http://www.buytelescopes.com/manufacturer.asp?s=2&m=69
呢種行為算唔算係劏客呢?
說不定其他廠商都係同一德性......
講到o的鏡好難生產, 成本好高, 所以先至要買到咁貴......
其實o的鏡唔難生產, 成本都唔高, 只不過係廠商想謀取暴利......
H-alpha 濾鏡很難做, 所以很貴.bingsze 寫:但我覺得濾鏡的成本不應這麼高,不像鏡片的要求,小小的一個60mm都要兩萬幾。
可能,這是我的錯覺。
可以參考:
http://www.hkastroforum.net/viewtopic.php?t=6596
http://www.cloudynights.com/item.php?item_id=1791
In order to achieve a very high finesse the manufacturer needs to control many factors. Reflectivity, parallelism, surface quality, surface flatness and tilt need to be very tightly controlled. The most expensive factor here is surface quality and flatness and the difficulty increases at more than the square of aperture making large etalons quite expensive. Even if you are able to polish the plates to 1/100 wave your coating has to be dead on to keep it.
P.S. 一般望遠鏡, 最低光學要求只是 1/4 波長誤差
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