Hikvision
DS-2TD2637-25/QY
Bullet Camera · 0.1MP (384×288)
- • 14.9° HFOV at 25mm
- • 1100 m effective range
- • 50 m IR illumination
Side-by-side comparison · cross brand
Hikvision DS-2TD2637-25/QY vs Dahua HAC-B4A21-VF
Spec-by-spec comparison of two bullet camera models, with EN 62676-4 lens math and design recommendations.
Dahua
HAC-B4A21-VF
Bullet Camera · 2.1MP (1920×1080)
- • 102° HFOV at 12mm
- • 50 m effective range
- • 40 m IR illumination
Specification side-by-side
| Hikvision DS-2TD2637-25/QY | Dahua HAC-B4A21-VF | |
|---|---|---|
| Manufacturer | Hikvision | Dahua |
| Form factor | Bullet Camera | Bullet Camera |
| Resolution | 0.1MP (384×288) | 2.1MP (1920×1080) |
| Focal length | 25mm | 12mm |
| Horizontal FOV | 14.9° | 102° |
| Effective range | 1100 m | 50 m |
| IR distance | 50 m | 40 m |
| Low-light / ColorVu | Standard | Standard |
Verdict
Dahua HAC-B4A21-VF captures more pixel detail (2.1 MP vs 0.1 MP), useful for license-plate or face identification at distance. Hikvision DS-2TD2637-25/QY reaches further (1100 m vs 50 m) — better for perimeter and parking-lot wide shots.
Frequently asked questions
Is Hikvision DS-2TD2637-25/QY better than Dahua HAC-B4A21-VF?
Dahua HAC-B4A21-VF captures more pixel detail (2.1 MP vs 0.1 MP), useful for license-plate or face identification at distance. Hikvision DS-2TD2637-25/QY reaches further (1100 m vs 50 m) — better for perimeter and parking-lot wide shots. For installation-specific advice — mounting height, tilt, obstacle shadowing, BOM and PoE budget — drop both cameras into TodAidesign and the FOV cones, DORI rings (per EN 62676-4) and cable schedule render in real time on a satellite map or imported floor plan.
What is the field of view of Hikvision DS-2TD2637-25/QY vs Dahua HAC-B4A21-VF?
Hikvision DS-2TD2637-25/QY has a 14.9° horizontal FOV at 25mm. Dahua HAC-B4A21-VF has a 102° horizontal FOV at 12mm. Dahua covers a wider scene at the same distance; the FOV calculator on TodAidesign converts these into linear meters of coverage at any chosen target distance.
Which camera has stronger IR illumination?
Hikvision DS-2TD2637-25/QY reaches 50 m of IR illumination versus 40 m for Dahua HAC-B4A21-VF. The further-reaching IR camera is the better fit for unlit yards, parking perimeters and warehouses without permanent lighting.
Can I plan a project mixing Hikvision and Dahua cameras?
Yes. TodAidesign is multi-vendor by design — drop Hikvision and Dahua cameras on the same canvas, share the same EN 62676-4 lens math and DORI ring overlays, and consolidate them into one BOM with cable schedule and PoE budget. Vendor design tools (Axis Site Designer, Hikvision HiTools, Dahua Project Design Tool, i-PRO SDT) cannot do this because each speaks only its own catalog.
Continue reading
FOV Calculator →
Convert 14.9° vs 102° HFOV into linear coverage at any distance.
DORI Calculator →
Compute Detect / Observe / Recognize / Identify ranges per EN 62676-4.
Bandwidth Calculator →
Estimate Mbps per camera for codec, FPS, scene complexity.
Browse all cameras →
Verified in-stock camera specifications.
Test both cameras in your project
Drop Hikvision DS-2TD2637-25/QY and Dahua HAC-B4A21-VF on a real satellite map or imported floor plan. See live FOV cones, DORI rings, BOM and cable schedule in seconds.