SVBONY SV154 1.25" 70-Degree 15mm Super-wide Angle Telescope Eyepiece / Twist-Up Eyecups Features: 1.SVBONY 15mm super-wide angle 1.25" telescope eyepiece 2.Super-wide 70-Degree apparent field of view gives you that unforgettable lost in space feeling 3.5-Elements / 4-groups made of high index glass deliver sharp, high contrast vistas 4.13mm eye relief provide comfort and convenience 5.Twist-Up eyecups, and barrels threaded for use with 1.25" eyepiece filters (M28.5*0.6) 6.Sleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the focuser or diagonal 7.Blackened lens edges, anti-reflection threads for maximum contrast Specification: 1.Brand: SVBONY 2.Model: SV154 3.Focal Length: 15mm 4.Eye Relief: 13mm 5.Field Stop Diameter: 18.8mm 6.Apparent Field of View: 70° 7.Barrel Size: 1.25inch 8.Lens Structure: 5 -Elements/4-Groups 9.Filter Threads Standard: 1.25" Filter Thread (M28.5 x 0.6) 10.Coatings: Fully Multi-Coated 11.Blackened Lens Edges: Yes 12.Barrel Safety Recess: Yes 13.Eyecups: Twist-Up 14.Eyecups Material: Metal 15.Net Weight: 71g / 2.5oz / 0.15lb Coatings: Fully Multi-Coated 13mm eye relief provide comfort and convenience Filter Threads Standard: 1.25" Filter Thread (M28.5*0.6) Super-wide 70-Degree apparent field of view gives you that unforgettable lost in space feeling Field Stop Diameter: 18.8mm Blackened lens edges, anti-reflection threads for maximum contrast Non-slip rubber grip Safety Undercut Sleek black barrel with safety undercut to reduce the possibility of the eyepiece slipping out of the focuser or diagonal Twist-Up eyecups How to use it? Specification:

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