product name: telescopeOptical System: Refractioneffective magnification: 175XCaliber: 70mmeyepiece: 20mm, 10mmfocal length: 400mmCoke ratio: F5.7Searching for a star mirror: 5X24Star: 12Optical coating: Multi-layer coatingzenith mirror: 1-1/4resolution: 1.45 angular secondsMain mirror length: 450mmTripod: Aluminum tripodNote:1. The above dimensions are manually measured according to the actual product, allowing a little error.2. All photos are taken in kind, and each display may be diffet due to illumination and there may be a slight chromatic aberration.3. This product only sells telescopes that appear in photos.4. Your satisfaction is our goal,If you have any questions, we will reply within 24 hours, thank you.