FLT98 ED triplet DDG photo edition
Optical system
光學系統

三片式低色 散 FD APO
(FPL-53 Air Spaced, Japan made Ohara glass)
Effective aperture
有效口徑

98mm
Coating
光學鍍膜

Super Multi-Coated with a special super-high transmission coating (STM Coating) on all surfaces.
多層Super Multi-coating 高 透 光 超 級 鍍 膜 於所有玻璃表面
Focal length
焦　　距

618mm（f/6.3)
Focuser (FLT-98 new version)
對焦座

3.5" New Robust Linear Focuser, rotatable design 羽毛調焦
Intergrated 1:10 fine focus, 100 mm Focuser Travel Length
Digital Display Guage (DDG)

Focus Time, date, temperature

Resolution
解 像 力

0.85 arc second
0.85秒角
Limiting magnitude
極限星等

11.1等
Type of mount
 抱 箍

2 mounting rings included
2 個強化抱 箍


Tube surface handling
鏡筒表面處理

 5 layer Dupont coating
5 層杜邦 (Dupont) 烤漆
Tube length
鏡筒長度

513mm 遮光罩後縮狀態
600mm 遮光罩前伸狀態
Weight 重　　量

5.18kg (11.4lbs)

Soft carry bag 軟包 Robust Durable Soft Carrying bag