About "How to buy astronomical telescope ? How to buy astronomical telescope?" Introduce some general opinions and suggestions on choosing astronomical observation equipment to astronomical enthusiasts. I hope it can help fellow practitioners develop rapidly in the current domestic astronomical equipment market, which is also a mixture of fish and dragons, and can calmly and objectively make their own choices and buy the most suitable astronomical equipment. The
specification means "X*XX" often marked on the telescope, such as 8*40, which means magnification 8, and the effective diameter of the objective lens is 40 mm. When choosing, you cannot find large diameters or large multiples. In terms of multiples, it is generally believed that when handheld, the jitter caused by the pulse will have a significant impact on the observation (note that jitter is not entirely due to heavy weight. When heavy stars are not excessive, jitter is mainly due to the pulse, which is inevitable, and high multiples will make the jitter of the same amplitude more obvious on the retina). In addition, the field of view will become narrower under the same circumstances. There is another problem with the large ratio that is generally a few meters long in the nearest focus distance. When the
multiples soar, if the technical level remains unchanged, it will also lead to deterioration in all aspects of imaging levels. Therefore, if it is a product with multiple different pluralities in the same brand and series, 6-8 times is generally the most recommended, and the recommended multiples for various purposes are 8 times the most favorable.
has a large diameter, which brings a large amount of light transmission (increased by square), better color saturation (low saturation, it feels like a little haze), but it will also lead to increased distortion and chromatic aberration control difficulty and increased weight (not only objective lens, but also prism ).
hopes it can bring some help to everyone.
