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Specifications: Material: Brass Magnification: 25 Object lens: 1.20in Object diameter: 30mm Exit pupil diameter: 1.2mm Field of view: 270ft. At 1000yds.(162m/1000m) Minimum focusing distance: 6.5 ft Contraction length: 135mm / 5.3in Extended length: 33cm / 13.0in Product weight: 213g / 7.5oz Package size: 5.5 x 5.5 x 15 cm / 2.2 x 2.28 x 5.9 in Package weight: 261g / 9.2oz HOW TO USE Your Hand-held Telescope: Keep the scope folded and stored when you don't use it. Pull the Barlow all the way out. Point the objective lens to the object and look through from eyepiece. Slightly push the barlow in for focusing until you can see the object. Sometimes it is necessary to pull a bit out ward again if you have pushed too much in. By pushing and pulling the barlow bit by bit, the image will be visible gradually. With slow and tiny motion, rotate the eyepiece bit by bit to push and pull the barlow so as to reach a sharp image. Note: The motion for micro-adjustment of focus must be made slowly bit by bit. Package List: 1 * Collapsible Brass Spyglass 1 * Lens Cloth 1 * Leatherette Case 1 * User Manual Customer Service: If you have any problem of our product, you can click "seller contact" button in your Amazon account to email us. we would be delighted to help you and we will reply as soon as we can. Product Warranty: 30 days money-back , 12-month warranty. Any questions you have, please don't hesitate to contact us. If you like our product, click Add to Cart to get it.