10× optical zoom — True optical magnification (~10×) rather than just digital zoom. Optical zoom preserves image quality when you magnify the subject.
4K (video) compatibility — Lens and phone system support recording video at 4K resolution while using the telephoto zoom, so that you get high-resolution video even when zoomed in.
High quality optics / glass elements — Multi-element glass lens (not cheap plastic or resin) with coatings (anti-reflection, multi-layer) to reduce flare, ghosting, vignetting and distortion.
Wide compatibility with smartphones — Lens mount or clip system that works on many phones (various camera module layouts, thickness, protruding lenses) and supports the phone’s telephoto camera.
Good low-light performance / image stabilization — Because telephoto magnifies any camera shake, having optical image stabilization (OIS) or a steady mounting/rigid connection helps. Also a relatively large aperture or good lens transmission helps in less-bright conditions.
Maintain image clarity at high zoom — At 10× zoom, small movements, focus issues and aberrations are magnified, so you want a lens that keeps sharpness, contrast and colour fidelity.
Suitable focus distance / field-of-view — The lens should allow you to focus at standard telephoto distances, and have a field-of‐view that matches what you'd expect from 10× (i.e., narrower view, farther subject).
Good build and mounting / alignment — Telephoto attachments can introduce vignetting, misalignment, or odd color shifts if not well built or aligned with the phone’s optical path.
Feature | Specification Line | Description |
| Magnification | 10X Optical Zoom | Provides a 10x increase in focal length, bringing distant subjects closer. |
| Max Resolution | 4K Ultra HD | Indicates the lens is designed to work with and support the high resolution (UHD/4K) of modern smartphone cameras. |
| Lens Type | Telephoto Zoom Lens | The core function is to magnify distant objects. Note: "Zoom" is often used loosely; it is primarily a fixed telephoto magnification. |
| Aperture | $f/2.0$ (or similar) | (Approximate) Refers to the maximum opening of the lens, affecting light-gathering capability. |
| Material | High-Quality Optical Glass | Specifies the lens elements are made of glass for better clarity than plastic. |
| Body Material | Aluminum Alloy / CNC Processed | Describes the robust construction of the lens barrel (the black part you see). |
| Minimum Focus | Varies (Often > 3 meters) | The closest distance at which the lens can focus clearly on a subject. |
| Attachment | Universal Detachable Clip | The mechanism used to secure the lens over your smartphone's camera. |
| Compatibility | Universal for Most Smartphones | Designed to work with a wide range of phones (iPhone, Android, etc.) regardless of brand. |