TypeA Come with a 2 adapter, easy fit into 1.25 or 2 focuser, 7 adjustable brightness level. Easy to observe the laser target and adjust screws on the body until the red dot is centered, no need to keep looking at the eyepiece of telescope for long time. Feature: Easy and time saving to collimate1.25 and 2 telescopes, come with a 2 removable adapter. 7 adjustable brightness level for amazing alignment in dark and day. Wavelength 635-655nm and less than 5mWoutput power for safe use. Adjust screws for easy collimation. Aluminumalloy constructed for long time service. Perfect for Newtonian telescope, SCA and Reflector telescope. Specification: Material: Aluminumalloy Output power: 5mW Wavelength: 635-655nm Brightness: 7 Powered by: 1*CR-2032 (not include) Size: 103.4 * 31.7mm / 4.0 * 1.2in Total length: 137mm / 5.3in Weight(collimator): 82g / 2.8oz Weight(adapter): 53g / 1.8oz Package weight: 251g / 8.8oz Package size: 21 * 8.5 * 5.8cm / 8.2 * 3.3 * 2.2in Package list: 1 * Collimator TypeB You can see the image upside down but left-right correct with 90 degree while upright with 45 degree lens. Just simply insert the erecting lens into 1.25 focuser and enjoy the nature far away: see the birds, deer at the edge of the forest, the summit cross on a mountain or a cruise ship far away on the sea Feature: Fit for 1.25 focuser stand and eyepiece. 90 degree erecting images upside down but left-right corrected, and 45-degree images uprightly. Work well with refractor, Cassegrain and catadioptric telescope but not recommended for reflector telescope. With dust cover to keep the lens clean for crisp viewing and long time service. Specification: Angle: 45 / 90 (optional) Material: Plastic + Metal Size: 1.25inch Weight: 74-88g / 2.6-3.1oz Package weight: 92-106g / 3.2-3.7oz Package size: 10.5 * 7 * 5cm / 4.1 *2.7 *1.9in Package list: 1 * Erecting Lens TypeC This 25x30 handheld monocular telescope can magnifies far away objects and landscape with clear images. It is collapsible for easy storage, very convenient for traveling. Features: Collapsible monocular extends to 12.8 inches and retracts to 5.3 inches. Powerful 25x magnification and 30mm objective lens diameter. Blue-coated optics provide crisp clear images. Durable aluminum construction with brass finish and comfortable leather cover. Comes in a leather bag for easy storage and carrying. Great gift for those who love traveling, bird watching, and telescope collection, etc. Specifications: Magnification: 25X Objective Lens: 30mm Eyepiece: 25mm Field of View: 76m/1000m Eye Relief: 22.2mm Exit Pupil: 4.3mm Extended Length: Approx. 32.5cm / 12.8in Contraction Length: Approx. 13.5cm / 5.3in Weight: Approx. 200g / 7.0oz Package List: 1 * Monocular 1 * Lens Cloth 1 * Storage Bag TypeA TypeB TypeC Many Questions about Drop