Frequently Asked Questions

1. What is the difference between CS and C-mount?

C or CS mounts are threaded connections to attach a lens to the camera. The difference is the flange back length between the lens elements and the video camera. With a C-mount the flange back length is 17.526 mm and with a CS mount 12.5 mm.

2. Can I screw CS-mount lenses onto C-mount cameras?

No, that doesn't work!

3. Can I screw C-mount lenses onto CS-mount cameras?

You can adapt a C-mount lens to a CS-mount camera using a 5 mm adapter ring (VM400) which is screwed between the lens and the camera!

4. What is the difference between an electronic day/night camera and a mechanical day/night camera?

In order to be able to work with less light and with IR radiation, the cameras switch over from colour mode (day) to black/white mode (night). With a mechanical day/night camera the colour burst is switched off and the IR cut filter, which is situated in front of the image sensor, is moved mechanically. As a result, IR light can pass unhindered to the sensor.
With an electronic day/night camera only the colour burst is switched off. The remaining filter in front of the CCD now only lets IR light of approx. 850 nm through.

5. Which camera models are better, mechanical or electronic day/night cameras?

Technically speaking, mechanical day/night cameras have greater efficiency as they provide colour fidelity images during the day in sunshine and can also work with IR light in the dark by swivelling the filter away.
Cameras with electronic toggling only let IR light through with a wavelength of about 850 nm. As a result, the use of IR light is limited and in sunlight it may result in colour distortions.

6. What is an IP protection class?

IP (Ingress Protection) protection class designates the ingress protection of technical equipment. The protection class is shown by two numbers after the letters IP. With the IP class you can determine how well protected the equipment is.
The 1st digit indicates the protection against the ingress of a solid body into the equipment.
0 - not protected
1 - under 50.0 mm diameter (back-of-hand protection)
2 - under 12.5 mm diameter (finger protection)
3 - under 2.5 mm diameter (tool protection)
4 - under 1.0 mm diameter (wire protection)
5 - dust-protected (full contact protection)
6 - dust-tight (full contact protection)

The 2nd digit indicates the protection of the equipment against the ingress of water with a harmful effect.
0 - (not protected)
1 - vertical dripping
2 - dripping at an angle to the vertical of 15°
3 - spray water (up to 60° to the vertical)
4 - splash water
5 - water jet (from all directions)
6 - temporary flooding
7 - temporary immersion in water

7. Which lenses fit the MP3DN-2 cameras?

M0814MP, M1214MP, M1614MP, M2514MP, M3514MP, M5018MP, M7514MP

8. Which DVRs can transfer images onto a PDA?

The Digimaster and ZR-DHC series can transfer images onto a PDA. For this you require the free software for your PDA. The software is only supported by Windows Mobile units.

The H.264 Digimaster series also provide solutions for smarthphones like iPhone or Android-based ones.

9. Can I transmit TCP/IP signals through an existing coaxial cable?

Yes, with the additional unit CN-HWC. These units have a network connection on one side and a BNC connection on the other. In this way you can transmit 100 MB/s over a distance of 250 m. With greater distances the bandwidth available is reduced.

10. What are aspherical lenses?

Aspherical lenses were developed so that more light passes through the lens. This was achieved by means of special grinding of the lenses. In addition, sharp reproduction of the scene was achieved in the edge areas as the rays which pass through the lens all converge at the same point, which is not the case with normal spherical lenses.

11. What is an IR-corrected lens?

The magnetic waves of the visible and IR ranges have different wavelengths. When they pass through a lens, these wavelengths are broken in a different way and so they converge at two different focal points. This results in blurred images between the colour images and black/white images. The IR-corrected lenses are made of a special glass which breaks both the wavelengths of the visible range and those of the IR range equally and therefore always concentrates the light at the same focal point.

12. Can you use non-IR-corrected lenses with IR lighting?

Yes, you can. With black/white cameras the lenses are set so that you obtain sharp images both by day and by night.

13. What are megapixel lenses?

You can scarcely believe it but a lens also has a resolution. This is limited by the choice of the glass. Normal lenses for CCTV application have a resolution of around 500,000 pixels. There is no standard for megapixel lenses but you talk about a megapixel lens as soon as it has a resolution of 1,000,000 pixels.

14. How does CBC define a megapixel lens?

Our megapixel lenses have a resolution of up to 5,000,000 pixels in the centre and min. 1,000,000 pixels towards the edge or more.

15. Is it possible to access the digital recorders from a distance (remote) via a network?

Yes. Both the C-MP series and the Digimaster and ZR-DHC series have a free Windows software with which you can access the recorders via a network.

"It is also possible to create a connection with the Internet Explorer. In this case, no additional software installation is generally necessary."

16. I would like to view my cameras via the Internet. Is that also possible?

Yes, provided the recorders are connected to the Internet. This is often achieved with a router.

17. What do I have to watch out for when accessing the Internet via a router?

Firstly, you should give the recorder a static (fixed) IP address. This must be available in the network and so must not already be used by another unit (PC, printer etc.).

Moreover, this address must be from the same address room as the router. If, for example, the router has the address "", the recorder should, for example, get "".

It is also necessary to set up port forwarding on the router. Taking the ZR-DHC as an example, this would be 12000 in the standard configuration, 12001 for access via the Internet Explorer port 80. For this, please consult the router manual.

18. Do I need a static (fixed) IP address from my Internet provider?

No, that is not essential. It is possible either to use the integrated DDNS functions of the recorders or to fall back on equally free providers such as Many routers support this option.

As a result, you have a static (fixed) Internet address, for example

with a changing IP address as is usual with most Internet providers.

19. The images are only transmitted very slowly via the Internet. What could be the cause of that?

This mainly depends on the speed at which the recorder can send data into the Internet (uploading). As an example: With a 2000 DSL connection you can download data at about 2 Mbit/sec.; the upload, however, is generally only 192 Kbit/sec. The latter roughly corresponds to three times the speed of an ISDN connection.