北潭涌試用香港最大的32"望遠鏡及Seestar S30 Pro Field Test at PTC with Hong Kong’s Largest 32" Telescope and Seestar S30 Pro

分類: 器材 Equipment
2026-02-06
昨晚大氣透明度一般，月亮也是黃的，純粹測試一下用Tesla Model Y連同一位乘客把0.8米鏡運出去觀測，同時也帶了Seestar S30 Pro拍拍，同行還有3位星河科研社人員。
  • 天狼星的十字星芒像鑽石光芒奪目，也說明光軸夠精準，伴星用Ethos 8的345x輕易拿下，跟天狼星之間隔著遼闊的天空。
  • M41疏散星團佈滿整個Ethos 21視場，從小年時便留意那顆中央紅星原來並非唯一。大鏡集光力夠，星點色彩飽和度便高。
  • 獵戶座大星雲的不再只有綠色，是從中心展開的綠、紅以及紅綠的混色，Ethos 13的210x最好看。加LPS-P2或LPS-V4濾鏡，核心的絲狀細節進一步提升，不再是以前只有大結構的雲氣。345x下四合星外的E、F星不是TMB 203APO可比。
  • 木衛二歐羅巴凌木不再是小鏡的隠約之間，Ethos 4.7推上590x，雖然視寧度只有7/10，但木星面外的木衛一、三、四圓面清晰可見，回到位處海邊的星河科研社大美督基地，可輕易看見木衛面地貎，換上TMB Supermonocentric細節及飽和度提升一截。
  • 在H-beta濾鏡下只能隠約看到馬頭星雲，要清洗積塵的主鏡及待天氣透明度較好時再去。

  • 昨晚優化了一下機械及電機方面，幾個目標校正後，追蹤已較精確，中倍率長時間追蹤，590x甚至用上超窄視場的TMB Supermonocentric目鏡亦能應付。

A field test was conducted at PTC using Hong Kong’s largest 32‑inch telescope, together with the Seestar S30 Pro. Atmospheric transparency was only average last night, and the Moon appeared noticeably yellow. The primary purpose was to test whether a Tesla Model Y, carrying one passenger, could transport the 0.8 m mirror to the observing site. The Seestar S30 Pro was also brought along for some casual imaging. 3 other staffs of Galaxy Scientific Group were also present.
  1. Sirius displayed brilliant, diamond‑like diffraction spikes, clearly indicating excellent collimation. The companion star was easily resolved at 345× using an Ethos 8 mm, separated from Sirius by a wide expanse of dark sky.
  2. The open cluster M41 filled the entire field of view of the Ethos 21 mm. A reddish star near the center, which had been noticed since childhood, turned out not to be unique. Thanks to the large aperture and strong light‑gathering power, stellar colors appeared highly saturated.
  3. The Orion Nebula (M42) was no longer simply green. Instead, it showed a complex blend of green, red, and mixed red‑green hues radiating from the core. The view was most impressive at 210× with the Ethos 13 mm. When using LPS‑P2 or LPS‑V4 filters, fine filamentary structures in the core became significantly more pronounced, far beyond the large‑scale nebulosity seen in the past. At 345×, the E and F stars of the Trapezium were clearly visible and beyond comparison with what a TMB 203 APO can deliver.
  4. During a transit of Europa, the event was no longer a barely perceptible hint as seen in smaller telescopes. Pushing to 590× with the Ethos 4.7 mm, and despite seeing of only 7/10, the disks of Io, Ganymede, and Callisto were clearly resolved outside Jupiter. Back at Galaxy Scientific Group’s Tai Mei Tuk coastal base, surface features on the Galilean moons could be seen with ease. Switching to a TMB Supermonocentric further improved both detail and color saturation.
  5. Through an H‑beta filter, the Horsehead Nebula was only faintly detectable. A thorough cleaning of the primary mirror and a return under better transparency will be required.
  6. Last night, some mechanical and drive optimizations were carried out. After calibrating several targets, tracking became noticeably more accurate, allowing long‑duration tracking at medium magnification; even at 590×, the system was able to cope well, including with the ultra‑narrow‑field TMB Supermonocentric eyepiece.
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