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2023-10-09
※Good Optics: As long as the BAK4 prism is configured, the FMC (integral multi-layer coating) optical performance is basically guaranteed. With this configuration, the basic price will be more than 40$. For example, products below $20 are also promoted to use BAK4, and FMC coating is enough. It’s time to keep your eyes open!
※The exit pupil should be long: exit pupil distance (eye point distance) ≥15mm is preferred, this can ensure the comfort of observation!
※Small size: from the point of view of carrying characters, small size is more portable, while making the telescope smaller must ensure that the optical difficulty is higher!
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