The telescope has a focal length of 360mm and an opening of 50mm. The telescope are two Huygens.Okulare with 20mm and 6mm in, and a Barlow lens with three times magnification. The magnifications that can deliver the telescope without Barlow lens, are 18x (with 20mm eyepiece) and 60 times (with 6mm eyepiece). This is tolerable by the physical limits. The 3X Barlow lens is superfluous, as it provides with the 20mm eyepiece a 54-fold magnification. The 6mm eyepiece alone delivers a 60-fold magnification, and the Untersched between 54-fold and 60-fold is negligible. On the other hand, the 3x Barlow lens would give the 6-mm eyepiece a purely theoretical, magnification of 180 times. With an aperture of 50 mm that is grotesque. The picture will be much worse at 180 times magnification, as at 60-fold magnification.
So without Barlow lens, the telescope is acceptable if certain but not a bargain. It is, apart from the Barlow lens, in the area of Vergößerungen not oversized.
