Features：
70mm F-6 ED hand figured with traditional low polishing technology
Doublet air spaced design
ED optics significantly reduces chromatic aberration
Blackened lens edges
Fully multi coating
Fully aluminum structure                      
Collimation screws for each lens
Metal baffles
Sliding dew shield to reduce glare
Felt-lined mounting rings and dovetail plate
2" Crayford focuser offers dual-speed focusing (11:1) for greater precision