※ Regarding optical performance, as long as a BAK4 prism configuration is used, coupled with FMC (multi-layer coating) technology, the optical performance can be basically guaranteed. Under this configuration, the basic price is usually over 40.However, evenforproductsunder20, BAK4 prisms and FMC coatings are still used, which is sufficient to meet basic needs. So, please be vigilant and choose the appropriate product!
※ The field of view should be relatively wide: whether it’s a stage play or a concert, performances usually involve multiple participants. A wider field of view can see more of the scene and observe the plot more completely. The field of view angle 27.5°, which can be selected according to the actual application scenario.
※ The eye relief should be relatively long: an eye relief (eye distance) 215mm is more ideal, as this can ensure the comfort of observation.
※ The size should be relatively small: from the perspective of portability, a smaller size is more convenient to carry. But when reducing the size of the telescope, it must be ensured that the optical difficulty does not become too high.