What Is Xiaomi's Periscope Telephoto Lens and How Does It Compare to Other Brands?

Xiaomi's periscope telephoto lenses are among the most advanced in the smartphone industry. But what exactly is a periscope lens, and how does Xiaomi's implementation differ from competitors?

What Is a Periscope Telephoto Lens?

A standard smartphone lens points directly outward, limiting maximum focal length to the phone's thickness. A periscope lens uses an angled prism to redirect light sideways through the phone body, allowing for much longer focal lengths without increasing thickness.

Standard lens: Light → Sensor (short distance)
Periscope lens: Light → Prism (90°) → Lens stack → Sensor (long distance)

This enables 5× to 10× optical zoom in a standard-thickness phone.

Xiaomi's Periscope Implementations

Phone	Telephoto Sensor	Optical Zoom	Max Zoom
Xiaomi 15 Ultra	200MP periscope	4.3×	120× digital
Xiaomi 14 Ultra	50MP floating telephoto	5×	120× digital
Xiaomi 13 Ultra	50MP periscope	5×	100× digital
Xiaomi 15 Pro	50MP periscope	5×	100× digital

Xiaomi's Floating Telephoto" Innovation (14 Ultra)

The Xiaomi 14 Ultra introduced a unique floating telephoto system:
- The telephoto module can shift its position within the phone chassis
- This enables optical image stabilisation across a wider range of shooting distances
- Also improves close-focus distance (macro telephoto shots)

Comparison with Competitors

Feature	Xiaomi 15 Ultra	Samsung S25 Ultra	iPhone 16 Pro Max
Max optical zoom	4.3× (200MP)	5×	5×
Telephoto sensor size	Large (200MP)	50MP	12MP
Periscope type	Folded optics	Folded optics	Folded optics
AI zoom enhancement	Yes (Leica AI)	Yes (ProVisual Engine)	Yes (Photonic Engine)
Max digital zoom	120×	100×	25×

When to Use Telephoto vs Ultrawide

Distance	Camera to Use
< 0.5m	Macro / ultrawide
0.5m – 3m	Main camera
3m – 10m	2× or main crop
10m – 50m	Periscope telephoto (4–5×)
50m+	Maximum optical, minimal digital

Practical Tips for Xiaomi Telephoto Photography

Use telephoto at 5× optical — avoid excessive digital zoom past 10×
For architecture: telephoto compresses perspective dramatically for stunning shots
For wildlife: combine 4.3× optical with minimal 2× digital crop for 8.6× effective zoom
For portraits: 3–5× focal length creates flattering subject compression and background blur

The periscope telephoto system is one of the most significant camera hardware advantages that Xiaomi flagships hold over mid-range competitors.