IPC-Color4M-TL

[MR2]

This is the TIOC Pro

EmpireTech IPC-Color4M-T 1/1.8" CMOS 4MP Smart Dual Light Active Deter

4MP 1/1.8" CMOS Built-in multi-core light, Max. IR distance is 30 m, Max. warm light distance is 30 m Intelligent monitoring: Intrusion, Tripwire Supports max. 512 G Micro SD card Built-in dual Mic Support two-way talk IP67 protection Sound and light alarm (red and blue lights) SMD 4.0

empiretech01.com

As I originally suggested, it would be good for your inside corridors. 3.6mm model

Fair warning, some of the Dahua Camera's are quite blurry close range, so pay careful attention to the min focus distance

2549:
2.8 mm: 1.7 m (5.58 ft)
3.6 mm: 2.6 m (8.53 ft)

3449:

Close Focus Distance

2.8 mm: 2.0 m (6.56 ft) 3.6 mm: 3.5 m (11.48 ft)

 

[bigredfish]

Fair warning, some of the Dahua Camera's are quite blurry close range, so pay careful attention to the min focus distance

2549:
2.8 mm: 1.7 m (5.58 ft)
3.6 mm: 2.6 m (8.53 ft)

3449:

Close Focus Distance

2.8 mm: 2.0 m (6.56 ft) 3.6 mm: 3.5 m (11.48 ft)

True, but on the 3449 pro 3.6mm I find it to be closer to 1/2 of that