Dahua
TPC-SD8621A-T
PTZ Camera · 0.3MP (640×512)
- • 40° HFOV at 35mm
- • 500 m effective range
- • 150 m IR illumination
Side-by-side comparison · within brand
Dahua TPC-SD8621A-T vs Dahua TPC-PT8420A-T
Spec-by-spec comparison of two ptz camera models, with EN 62676-4 lens math and design recommendations.
Dahua
TPC-PT8420A-T
PTZ Camera · 0.3MP (640×512)
- • 40° HFOV at 7.5-120mm
- • 500 m effective range
- • 150 m IR illumination
Specification side-by-side
| Dahua TPC-SD8621A-T | Dahua TPC-PT8420A-T | |
|---|---|---|
| Manufacturer | Dahua | Dahua |
| Form factor | PTZ Camera | PTZ Camera |
| Resolution | 0.3MP (640×512) | 0.3MP (640×512) |
| Focal length | 35mm | 7.5-120mm |
| Horizontal FOV | 40° | 40° |
| Effective range | 500 m | 500 m |
| IR distance | 150 m | 150 m |
| Low-light / ColorVu | Standard | Standard |
Verdict
Both cameras offer comparable specs on paper. The choice typically comes down to vendor lock-in, NDAA compliance and existing VMS integrations rather than raw imaging numbers.
Frequently asked questions
Is Dahua TPC-SD8621A-T better than Dahua TPC-PT8420A-T?
Both cameras offer comparable specs on paper. The choice typically comes down to vendor lock-in, NDAA compliance and existing VMS integrations rather than raw imaging numbers. For installation-specific advice — mounting height, tilt, obstacle shadowing, BOM and PoE budget — drop both cameras into CCTVplanner 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 Dahua TPC-SD8621A-T vs Dahua TPC-PT8420A-T?
Dahua TPC-SD8621A-T has a 40° horizontal FOV at 35mm. Dahua TPC-PT8420A-T has a 40° horizontal FOV at 7.5-120mm. Both cover the same angular scene; the FOV calculator on CCTVplanner converts these into linear meters of coverage at any chosen target distance.
Which camera has stronger IR illumination?
Dahua TPC-PT8420A-T reaches 150 m of IR illumination versus 150 m for Dahua TPC-SD8621A-T. 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 Dahua and Dahua cameras?
Yes. CCTVplanner is multi-vendor by design — drop Dahua 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 40° vs 40° 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.
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Test both cameras in your project
Drop Dahua TPC-SD8621A-T and Dahua TPC-PT8420A-T on a real satellite map or imported floor plan. See live FOV cones, DORI rings, BOM and cable schedule in seconds.