Excellent telescope, collects a lot of light with 120 mm (5"") aperture. At f/5.0 the lens aperture is wide, useful for astrophotography. The focal length is 600mm, which is low for a telescope of this size, but that's why this telescope has such a high aperture. About 8 pounds for the telescope alone (more if you add a tripod) is the telescope for its size fairly light, which is useful if you want to replace the tripod with a motorized equatorial mount. It is also easy to transport. The lens is a duo. A pleth showing some chromatic use of a triplet would drastically increase the cost of the telescope. All in all a great telescope for the money.
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