Consider The Lens Type When Buying Security Cameras

December 19th, 2019

People take their eyes for granted, but what they can do is actually very impressive.  A pair of eyes can figure out distances naturally, they can focus on different ranges, and when you look around you can spot movement in an arc over 180 degrees around you.  Cameras have advantages like never needing to blink and the ability to record exactly what happened onto a computer, but when you buy a camera for your O'Neill, NE home or business you have to make choices about what kind of lens will work best.


Field Of View


The field of view is how much the camera lens can see around itself.  Wide-angle lenses give you a wide field of view in all directions, but the images they capture are distorted and lose some detail.  Narrow-angle lenses don’t see as much, but they give you a true image of the environment and you get more detail from the resolution level.  Wide-angle lenses are best for cameras that need to capture a big area like the back of a store or a parking lot while narrow-angle lenses are best for important points like doorways and points of sale.




Just like the iris in your eye, the iris in a camera determines how much light enters the lens.  Not enough light and the image will look dark and muddy, but too much light and the image will be too washed out to see.  Some cameras come with a manual iris you set when you install the camera, and these are best for indoor cameras since the light level won’t change much.  Other cameras come with automatic irises that move as the light levels change.  This feature is more expensive, but it’s necessary for outdoor security cameras.




The aperture also adjusts how much light reaches the camera sensor, but it works differently than the iris.  While the iris makes the overall light level bright or dim, the aperture can change the depth of field, the amount of the image that’s in focus.  A wide aperture lets in more light, but only nearby objects will be clear.  A narrow aperture can give you a crisp image with sharp details hundreds of feet away, but the image is more likely to be dark and dim.


Modern camera designs are good at giving you a long depth of field with good light, but they tend to be more expensive.  You can also get cameras that can see well in low-light conditions, but they’re also expensive and can have depth-of-field issues.  When you don’t need these features you can save a lot of money, but when you do need them for your O'Neill, NE building they are absolutely worth the money.


Once you’ve figured out the best lens type for your needs and the camera’s location, you can find a good camera that meets your needs and doesn’t cost more than it has to.  However, it also helps to have a professional security expert to explain which cameras work best and where you should put them.  That’s why many people in O'Neill, NE turn to Guardian Security Services for help.