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nobody

11 Noi 2014 00:40



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Bresser ? Huh, bine ca nu-i un prototip de Takahashi.
Asta ? Our expert comment:
The 150/1400 EQ-2 Pollux telescope has a long focal length of 1400mm, but a short actual length. This is achieved using a built-in corrector lens that artificially increases the focal length. But this design means that the image quality of the system suffers and is not of such high quality as that of the classical Newtonian telescopes offered by Bresser or Omegon for example. This is particularly noticeable at higher magnifications and when planetary observing. This means that classic Newtonian telescopes are far better value for money than this instrument.

Customer reviews:
The telescope holds a 150mm f/5 spherical mirror and it causes horrendous aberration when taking long exposures. Even through the eyepiece, the aberration is visible and does not make it a good telescope for general observation purposes. You may be able to fix it when stopping down the aperture to a smaller size, but you may be better of with a smaller aperture telescope with an f-ratio higher than 5. Say, a 114mm-900mm Newtonian.