Pinhole Camera a.k.a. Bullet Camera
These cams are small in size, enough to fit in a wide variety of objects for a deceptive appearance. You can do the hiding yourself with a little help from DIY tutorials online or you can simply purchase those that are already premade.

The best thing about bullet cameras is that you can place them just about anywhere in the room and people will rarely guess that they’re being filmed. The greatest drawback, however, is its limited view, which is due to its minimal size.

Dome Cameras
This type of professional security camera is usually used in commercial and private establishments. It has great resolution and a wide view due to its form and design. Of course, its look is a dead giveaway about its purpose so it’s most likely to invite harm from potential troublemakers. Thankfully, however, most dome cameras have hard, damage-resistant casing – hopefully, it will be enough to prevent unwanted loss of footage.

Dome cameras are primarily mounted on the ceiling.

Infrared Camera a.k.a. Night Vision Camera
For surveillance after dark, your camera must be equipped with infrared or night vision. This is the only way to capture clear and sharp images or footage even in low or zero light levels. Keep in mind that everything captured will be rendered only in black and white.

Color Cameras
If you want greater detail during daytime, why not consider purchasing a color CCTV camera. Such models are sometimes equipped with infrared or night vision to allow you to monitor the area from day to night with a single camera. When the amount of light significantly decreases, the camera will automatically revert to using infrared to capture photos or videos.

Outdoor Cameras
Outdoor cameras do not have much difference compared to indoor cameras but rest assured that they have a sturdier design to ensure that they continue performing well in all kinds of weather. They are also water or moisture proof to allow them to work even when they are directly exposed to rain or snow.

Wireless Cameras
If you want to avoid giving away the location of your professional security cameras then make use of a wireless system. In most cases, wireless systems also have IP addresses to allow remote access to your surveillance system.