With the advent of HDTV and megapixel cameras, modern security systems can definitely provide images with ultra-high-resolution. When it comes to the quality of these high-resolution images, many components are necessary to achieve crystal-like clarity. Camera iris is one such component which is required to produce lucid images and videos.
What is an Iris?
It is an element, which is used to control the intensity of illumination being fed into the lens. It consists of a number of thin plates that are arranged in such a way that they create a circular opening in the center. This opening is also known as aperture.
The intensity of illumination is controlled by adjusting the width of this opening. If the aperture creates a wider opening, then more light can get through it, and if the aperture creates a smaller opening, it allows less light to pass through it. The light after passing through this opening strike on the image sensor and then it is converted into electrical pulses, and the video is created.
Why is it needed?
The intensity of illumination can make or break the quality standards of video footage. If there is too much light striking on the image sensor, then it will wash out the video, and if there is too little light, then there will be a complete blackout in the final image. So it becomes critical to have just the right intensity of illumination feeding into the camera. An iris does just that. Based on location, it will maintain the optimum illumination to produce a sharp and correctly exposed image which also features better resolution and contrast.
You may also like: Top 10 Best Selling Digital Camera Lenses (DSLR Lenses).
What are the different options?
Unlike the old days, today the advanced video monitoring equipment comes with various types of aperture controls like fixed, manual, auto and P-iris. Each of these four types differs a bit in its working. You can always choose the one that suits your purpose.
Let’s get an understanding of different types of iris control.
1. Fixed Iris
2. Manual Iris
3. Auto Iris
Recommended reading: What are the Best Smartphone Camera Lenses?.
4. P-Iris
Which option is best for you?
First, check the lighting conditions for the area you want to monitor. If the illumination is consistent and does not need frequent adjustments, like an office or a room, then go for fixed or manual aperture control. For places like construction sites and parking lots, where the lighting levels change drastically, choose auto iris or P-iris.
This article is written by Rohan Sharma. He is a gadget wizard, an active blogger, and an eminent speaker. With more than 10 years of experience to his credit, Rohan has always been a pertinent contributor to the security industry. He is associated with Revo America, a well-renowned security products manufacturer and retailer.