Evostar 90 AZ Pronto Slow-Motion telescope
NT$11800


Maksutov-Cassegrain 光學設計
如果您正在尋找具有高水平細節的清晰、對比鮮明的視場,Skymax 系列就是您的不二之選,它是 Sky-Watcher 的首屈一指的 Maksutov-Cassegrains 系列。 Maksutovs 通常被認為比 Schmidt-Cassegrains 能產生更清晰的圖像,它為天文學家提供了大視孔、高對比度和長焦距的緊湊型封裝。由於焦距比普通牛頓望遠鏡或折射望遠鏡長 5-7 倍,因此這些望遠鏡可提供更高水平的行星細節。
Skymax Maksutovs 的鏡子由硼矽酸製成,經過拋光並塗有我們專有的 Radiant™ 鋁石英™ (RAQ™) 塗層,可產生高達 94% 的反射率。所有 Maksutovs 都使用校正板來幫助減少色差,然後使用我們標誌性的 Metallic High-Transmission Coatings™ (MHTC™) 進行塗層,以實惠的價格生產專業級光學器件。
Skymax 180 包括2 英寸28mm目鏡、紅點尋星鏡、2英寸稜鏡、V 型鳩尾板一個軟質手提箱。
| SKU | S11540 |
| UPC | 050234115407 |
| Optical Info | |
|---|---|
| Optical Design | Mak-Cass |
| Mirror Coatings | Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7/Borosilicate |
| True Aperture (mm) | 182 |
| Primary Aperture (mm) | 199 |
| F/Ratio | 15 |
| Focal Length (mm) | 2700 |
| Secondary Diameter | 41mm |
| Secondary Obstruction (by diameter) | 23% |
| Secondary Obstruction by Area | 5% |
| Observational Info | |
| Dawes Limit | 0.64 |
| Rayleigh Limit | 0.78 |
| Limiting Mag. | 13.8 |
| Minimum Magnification | 26 |
| Maximum Magnification | 354 |
| Light Gathering (compared to next size down) | 44% |
| General Info | |
| Focuser | Primary Mirror |
| OTA Length (Retract/Ext.) | 22" |
| OTA Outer Diameter | 8.625" |
| OTA Weight (with accessories) | 19 |
| Accessories | |
| Included Finder | 9x50 Finder |
| Included Diagonal | 2" Star Diagonal |
| Mounting Accessories | V-Rail |
| Included Eyepieces | 28 LET |
| Magnification w/ Included Eyepieces | 96.4x |
| Included Case | No |
| Corrector | No |