Svbony SV135 Zoom Telescope Focal Field of for Astronomical Lunar and Planetary Observation Eyepiece, 1.25-inch FMC, 7-21mm Length, 57°-40° View,

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🔹 About Manuals If included, manuals are primarily in Japanese. We recommend using translation apps if needed. ----------------------------------------------------------------------------------- Standard Size: Standard 1.25" (31.7mm) fitting diameter. Can be used with any astronomical telescope with a 1.25" focusing device. 【Zoom Focal Length】Adjustable focal length from 7mm to 21mm. 7-21mm zoom eyepiece, equivalent to multiple eyepieces, provides high magnification with a short focal length. High-contrast imaging provides a better viewing experience. [Excellent optical quality] The high-refractive index rhythm transmission surface is equipped with an FMC multi-layer coating, minimizing chromatic aberration and providing a bright, natural field of view. [Applicable Scenes] The 16.3mm to 18mm zoom eye relief makes it ideal for observing the moon, medium-sized star clusters, wide-area clouds, and deep skies. Its 16.3mm to 18mm zoom eye relief reduces fatigue even during extended observations, providing a comfortable viewing experience. [Professional Optical Manufacturer] SVBONY is committed to providing customers with cost-effective optical products. Our products are sold in many countries around the world.