How to Choose High Resolution Dome Camera

There are several features and functions to consider when choosing a high resolution dome camera. By comparing these features, it will be easy for you to decide on what type of camera to purchase.  

1. Evaluate the Camera Resolution

When comparing one high resolution dome camera to another, one of the first points of comparison is the number of the TVL.  TVL stands for TV lines of resolution and is a measurement of a camera’s or monitor’s horizontal resolution power; the higher the TVL, the better the resolution. High resolution in a black and white camera is at 768 x 492 or higher and is equal to 570 TV lines and above. In order for a colored camera to be categorized as high resolution, it has to have more than 460 TVL.

2. Identify the Type of Image Sensor Used

There are two technologies used for capturing images digitally. CCD (charge coupled device) and CMOS (complementary metal oxide conductor) are the two image sensors commonly used by companies that manufacture security cameras. Each has its advantages and disadvantages and it is difficult to say which one is more superior.  The two biggest manufacturers of CCTV cameras vary in the image sensor they use. Pelco , for instance, uses CCD while Axis uses CMOS. Both Pelco and Axis make excellent surveillance dome cameras.
CCD or CMOS size are measured in fractions.  1/3” and ¼” are the most common image sensor sizes. 

3. Compare the Optical Zoom and Digital Zoom Features

These features are important in a high resolution dome camera. The more powerful the optical zoom and digital zoom is, the crisper, clearer and richer in color and detail a distant and small object is when zoomed in. 

4. Review the Day/Night Function

A good high resolution dome camera often comes with infrared features and WDR (Wide Dynamic Range) function. A high resolution infrared outdoor camera allows clear video capture even on situations wherein there is absolute darkness. Infrared range or IR range is measured in feet; the higher the IR range, the better.
WDR is also an important consideration when selecting a high resolution dome camera. The WDR function provides crisp and clear images even when illumination intensity is excessive.
Aside from comparative reviews, reading feedbacks from customers can also assist you in your decision making process. Often times, experiences of other people in using a product can help you determine if it is the right product for you.