**UWA 82° Series FMC Eyepieces** - Metallic Appearance • 4 Groups of 7 Optical Lenses • Ultra-Wide-Angle Apochromatic Design for a Large Field of View
**UWA 82° FMC Eyepiece (Eyepiece Parameters)** - **UWA 4mm**: Focal length 4mm, field of view angle 82°, exit pupil 12mm, steel sleeve size 1.25", lens diameter 21mm, lens structure 4 groups 7 elements - **UWA 7mm**: Focal length 7mm, field of view angle 82°, exit pupil 12mm, steel sleeve size 1.25", lens diameter 19mm, lens structure 4 groups 7 elements - **UWA 16mm**: Focal length 16mm, field of view angle 82°, exit pupil 12mm, steel sleeve size 1.25", lens diameter 24mm, lens structure 4 groups 7 elements
**Features** - UWA 82° Wide-Angle Series - 1.25-inch/31.7mm interface, one set with three focal lengths: 4mm, 7mm, and 16mm - 4 groups of 7 optical lenses, all with multi-layer green coating - Ultra-wide angle, flat field, apochromatic optical design - Metal lens frame, foldable eyecup, long eye relief, suitable for observation by various groups of people - 1.25-inch filter adapter thread reserved inside the steel sleeve bottom
When used on an astronomical telescope, an eyepiece with a smaller focal length provides a larger magnification, while an eyepiece with a larger numerical value has a lower magnification. During observation, a telescope with high magnification can observe objects with details, etc., and an eyepiece with low magnification can observe objects with a wider area such as landscapes and nebulae, making it convenient to find their detailed targets.