開光 Celestron EdgeHD 14" First Light
分類: 器材情報 Equipment
2022-11-24
早前某個晚上天氣特別好，大氣透明度也高，帶了Celestron EdgeHD 14"到星河科研社新界西新觀星基地開光， 當晚除了Televue Ethos目鏡外，也帶了一堆較短焦的TMB Supermonocentric目鏡測試，這目鏡是由已故Thomas Back設計及德國製造，被喻為月面行星目鏡的登峰造極之作，當年我甚至在德國用254APO折射鏡及600Dob對照測試，只要視場容得下，其超高對比度在深空天體方面的表現也無逢對手。
有經驗的月面行星觀測者，會用焦距緊密的目鏡一級級推高倍率觀測以搾取大氣視寧度容許的最多細節。當晚從500x、570x、667x、800x、1000x推高，高對比度的土星在800x止步，1000x並無增益但影像仍結實，低對比度的木星則以667x為限。看過了土星的5顆衛星、木衛凌木、天王星圓面、火星極冠及大流沙等，望遠鏡初步順利開光，便結束了當晚輕快的測試。
星河科研社計劃每月都會在新觀星基地推行觀測及器材實習活動，有興趣的朋友可以留意 https://eshop.astro.hk/hk/catalogs/lists/pages/1?sfc=077796c9-88f5-4376-b976-f2d3499ab533
當晚出動器材，
Celestron EdgeHD 14"
Sky-Watcher EQ8R Pro赤道儀
Rob Miller CNC三腳架
Televue Ethos 21, 13, 8mm目鏡
TMB Supermonocentric 4,5,6,7,8mm目鏡
Sky-Watcher EQ8R Pro赤道儀
Rob Miller CNC三腳架
Televue Ethos 21, 13, 8mm目鏡
TMB Supermonocentric 4,5,6,7,8mm目鏡
On a night sometime earlier, the weather was particularly good and the atmosphere was highly transparent. I brought Celestron EdgeHD 14" to the Galaxy Scientific Group New Territories West new observation Base for the first light. In addition to the Televue Ethos eyepieces, I also brought a bunch of short-focus TMB Supermonocentric eyepieces that night. This eyepiece was designed by the late Thomas Back and made in Germany. It is known as the pinnacle of lunar planetary eyepieces. I even used 254APO refractors and 600Dob in Germany for comparison tests. As long as the field of view can accommodate it, its super The high-contrast performance on deep-sky objects is also second to none.
Experienced lunar planetary observers will use eyepieces with tight focal lengths to increase the magnification step by step to extract the most details allowed by the atmospheric seeing. Pushed up from 500x, 570x, 667x, 800x, 1000x that night, the high-contrast Saturn stopped at 800x, 1000x has no gain but the image is still solid, and the low-contrast Jupiter is limited to 667x. After seeing the 5 satellites of Saturn, Jupiter, Uranus, the polar cap and Syrtis Major Planum of Mars etc., the brief first light test was done.
Galaxy Science Group plans to carry out observation and equipment practice activities at the new stargazing base every month. Interested enthusiasts can enroll here https://eshop.astro.hk/en/catalogs/lists/pages/1?sfc=077796c9-88f5-4376-b976-f2d3499ab533
First light equipment list,
Celestron EdgeHD 14"
Sky-Watcher EQ8R Pro Equatorial Mount
Rob Miller CNC Tripod
Televue Ethos 21, 13, 8mm eyepieces
TMB Supermonocentric 4,5,6,7,8mm eyepieces
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