ED 103mm optical tube is installed in this set which is popular for the reasonable cost and high performance.
It provides a very high performance in a full range of star watching from observation to photography.
Product No.25033-2
Objective Lens Effective Diameter : 103mm
Optical Tube Length : 820mm
Finderscope :Dark Field of View7x50mm
Attached Eyepieces : LV20mm、LV5mm
with SphinxD Mount, Sphinx Moun or D2 Mount