Product name: 1.25 inch interface focusing seat Key benefits Precise manual focusing: oblique teeth manual focusing delivers smooth, controlled motion so you can reach sharp focus on planets, the Moon, and faint deepsky details. Durable, lowplay construction: steel shaft with copper teeth provides a robust drive that resists wear and reduces backlash for repeatable focus positions. Broad compatibility: the 1.25 inch eyepiece interface fits standard 1.25' eyepieces and a wide range of visual and imaging accessories, simplifying upgrades and accessory swaps. Ready for observing and imaging: designed to work seamlessly with common astronomy accessories — Barlow lenses, filters, and camera adapters — so you can switch between visual observation and astrophotography without changing the focuser. What it does (clear, practical attributes) Interface size: 1.25 inches — compatible with all standard 1.25' eyepieces and accessories. Focusing mode: oblique teeth manual focusing for smooth, incremental adjustments. Gear shaft materials: steel shaft and copper teeth for strength, longevity, and consistent performance under frequent use. Accessory compatibility (visual): works with 2x and 3x Barlow lenses, moon filters, and planetary filters to enhance contrast and bring out surface detail on lunar and planetary targets. Accessory compatibility (imaging): accepts Tring adapters, prime focus adapters, field flatteners, focal reducers, smartphone adapters, and dedicated astronomy cameras for a complete imaging workflow. Why you need it If you want reliable, repeatable focus with standard 1.25' eyepieces, this focuser gives you a durable mechanical interface that minimizes play and preserves alignment. If you switch between visual observing and astrophotography, its broad accessory compatibility eliminates the need for multiple adaptors and reduces setup time. If you use magnifying elements or filters, the solid gear materials keep the optical train steady so you retain fine detail at power. Practical use scenarios Planetary observing: Attach a 2x or 3x Barlow and a planetary filter (or a moon filter) to the 1.25' interface. Use the obliqueteeth manual focuser to achieve sharp, magnification views of Jupiter's cloud bands, Saturn's rings, or lunar craters with reduced glare and improved contrast. Deepsky imaging with a dedicated camera: Install a field flattener or reducer and a prime focus adapter through the 1.25' interface, mount your astronomy camera, and make fine focus adjustments manually for stable star images across the field. Quick smartphone captures and casual imaging: Fit a smartphone adapter and use the manual focuser to align and finetune focus for lunar or planetary snaps without complex electronics. What you can expect in everyday use Smooth manual control that lets you lock in focus and maintain alignment when swapping eyepieces or adding Barlow lenses and filters. Mechanical durability from steel and copper components that withstand regular use and accessory changes. Simple integration into both visual and imaging setups thanks to standard 1.25' sizing and broad adapter compatibility. Compatibility checklist Eyepieces: all 1.25' eyepieces Visual accessories: 2x and 3x Barlow lenses, moon filters, planetary filters Imaging accessories: Tring adapters, prime focus adapters, field flatteners, reducers, smartphone adapters, dedicated astronomy cameras This 1.25 inch interface focusing seat is a practical, durable focuser choice for observers and imagers who use standard 1.25' gear and require reliable manual control and broad accessory compatibility.