Evostar 90 AZ Pronto Slow-Motion telescope
NT$11800


來自 Sky-Watcher 的令人興奮的 Starlux Maksutov-Newtonian 正是天文攝影師和高要求的目視觀察者一直在尋找的東西。
Mak-Newtonian 設計提供大孔徑復消色差性能和出色的視場校正。與類似尺寸的施密特-牛頓相比,馬克-牛頓產生的圖像更清晰,對比度更高。當然,Mak-Newtonian 也是出色的目視望遠鏡。 Maksutov-Newtonian 設計是近乎完美的光學設計。這種設計解決了天文學家和天文攝影師面臨的所有主要光學問題,而無需校正光學器件。
Mak 校正器無需使用像場平坦器即可為您提供完美平坦的像場。球面主鏡在彎月面上進行了校正,從而消除了慧差,在整個視野中提供精確的星星。
沒有顏色失真意味著您不必像購買類似尺寸的 APO 折射鏡那樣在玻璃上花費額外的錢。 使用 Starlux 190 Mak-Newt,您可以獲得快速的 APO 折射鏡性能,重量更輕,成本顯著降低。
| SKU | S11550 |
| UPC | 050234115506 |
| Optical Info | |
|---|---|
| Optical Design | Mak-Newtonian |
| Mirror Coatings | Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7/Borosilicate |
| Primary Aperture (mm) | 203 |
| F/Ratio | 5.3 |
| Focal Length (mm) | 1000 |
| Secondary Diameter | 64mm |
| Secondary Obstruction (by diameter) | 34% |
| Secondary Obstruction by Area | 11% |
| Observational Info | |
| Dawes Limit | 0.61 |
| Rayleigh Limit | 0.74 |
| Limiting Mag. | 13.9 |
| Minimum Magnification | 27 |
| Maximum Magnification | 374 |
| Light Gathering (compared to next size down) | 11% |
| General Info | |
| Focuser | 2" Dual Speed Crayford |
| OTA Length (Retract/Ext.) | 37.5" |
| OTA Outer Diameter | 9.5" |
| OTA Weight (with accessories) | 29 |
| Accessories | |
| Included Finder | 8x50 RACI |
| Included Diagonal | No |
| Mounting Accessories | Rings/V-Rail |
| Included Eyepieces | None |
| Included Case | No |
| Corrector | No |