鏡筒側面有尋星鏡基座,可安裝尋星鏡或其他所需天文配件。
15028HNT-AL的抱箍堅固耐用,大型手擰螺絲開合,使用方便。
15028HNT-AL的調焦器為大型雙速齒輪齒條式調焦器,在結構限制內盡可能的保證了2cm的調焦行程,支援更換電動調焦。調焦器前端設計有像場旋轉器,可整體旋轉調焦器,同時調焦器內建了一塊三片式修正鏡。調焦器結構非常穩定,可以承載3kg。後截距也採用標準的55mm(從M48螺紋端面算起),方便愛好者容易上手。
*15028HNT-AL調焦器出廠時均為鎖定狀態,使用者初次使用前請務必旋鬆鎖定螺絲,以免損壞機械。
鳩尾板為標準Losmandy型,長度為200mm。把手長度為200mm。
15028HNT-AL為全金屬材質,鏡筒採用鋁質打造,機械連接組件CNC加工。
15028HNT Aperture size 150mm Focal length 420mm Focal ratio f/2.8 Primary mirror type Hyperbolic reflective mirror Primary mirror material PZ33(similar to Pyrex glass) Corrector Three-element air-spaced refractive lenses(including one ED glass) Minor axis of secondary mirror 70mm Image circle 44mm Field of view 6 degree Main tube material Aluminum Main tube outer diameter 193mm Main tube length 443mm OTA weight 4.8kg Gross weight(including tube ring and dovetail plate) 6kg Resolution 0.77 arc second Limiting visual magnitude 12.7 Back-focus 55mm
Please refer to the contents of the manual for specific optical axis alignment: SHARPSTAR 15028HNT Instruction Manual