55mm diameter, the latest model in the PROMINAR series
Angled Type：Total Length 255mm / Weight 965g
Straight Type：Total Length 275mm / Weight 960g
More compact overall length
17-40×Wide Zoom Eyepiece (Non changeable)
High performance wide zoom eyepiece incorporating two XD lenses with special low dispersion which reduces color blur (chromatic aberration) to the absolute minimum.
