Do not forget that 650mm focal length of a spherical MG at 130mm aperture is very small for a good 1: 5 picture, this osprey has it, its main aperture spherical mirror has a focus of 65cm, disgustingly small, ideally from 90cm and above, at high magnifications, it gives a decent spherical aberration . therefore, high magnifications are not for this osprey, secondly, its thick plastic extensions of the spider of the secondary mirror are also not ice-they spoil the picture a little, and indeed plastic is plastic . its mount with plastic knees is only looks attractive, but very weak and not reliable, over time during operation, especially in the cold, the plastic in the mount can crack . very easily . the telescope can only be advised for entourage.
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