The lower the f-stop number, the wider the lens aperture. So unlike with an optical zoom, where you're looking for a high number, you want a camcorder with a low aperture or f-stop number. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads.
Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights.
Measure content performance. Develop and improve products. List of Partners vendors. Greg Scoblete. Gregory Scoblete is a former Lifewire writer covering video and consumer electronics. His work has appeared in Consumer's Digest, Digital Photographer, and other publications. Updated on July 03, Tweet Share Email. This article focuses on built-in camcorder lenses only. Was this page helpful? Thanks for letting us know! Email Address Sign up There was an error.
When you're comparing specifications on different cameras you are likely to see a few different terms that all refer to different types of optical zoom. It's important to understand these terms and what they really mean:.
You operate a varifocal security camera by turning a knob. This means that you can only adjust the level of zoom in person and once you've taken the camera out of its waterproof enclosure: picture. You operate a motorized, varifocal lens camera by clicking on a button on your NVR or surveillance app.
You can zoom in while your camera is recording a video, but the camera itself does not move around. You will be limited to where you have pointed the camera.
You can adjust cameras with motorized optical zoom via the on-screen controls on your NVR or app. PTZ cameras are fully motorized. You can change where the camera is pointed and the level of zoom. Most PTZ cameras can pan around degrees, tit up to 90 degrees, and zoom in more than any other type of camera. If you're still wondering which type of zoom is best then it's important to remember that it really depends on your unique situation. A good rule of thumb is that if you want to ID someone at feet, you need at least 4x zoom.
If you're going to ID someone at feet, you need 20x, and if you need to recognize someone at feet, you need 30x zoom. New to security camera systems? Confused by Analog vs IP? Bullet vs Dome? Indoor vs Outdoor? Don't even know what PTZ means? There are 4 Types of Zoom in Security Cameras. Get a Quote. Digital Zoom When you use digital zoom, the camera is enlarging the picture area at the center of the frame and crops the outer edges of the image.
Advantages of Digital Zoom Digital zoom's main benefit is that you can zoom in after your camera has recorded a video. Disadvantages of Digital Zoom The main disadvantage of digital zoom is that you lose picture quality. Optical Zoom You have used optical zoom before. Advantages of Optical Zoom Optical zoom's main benefit is that the picture will remain clear as you zoom in optically. Disadvantages of Optical Zoom Zooming with a high-optical zoom security camera magnifies and narrows your field of view.
Types of Optical Zoom When you're comparing specifications on different cameras you are likely to see a few different terms that all refer to different types of optical zoom.
It's important to understand these terms and what they really mean: Varifocal Lenses You operate a varifocal security camera by turning a knob. Motorized Varifocal Lenses You operate a motorized, varifocal lens camera by clicking on a button on your NVR or surveillance app.
Just Getting Started with Security Cameras? No problem! View Product. Lens Type Fixed 11 Varifocal 5. IP Camera Type Bullet 1. Depending on the lens, aperture can also be reduced as you increase the focal length. In smartphones, optical camera zoom is a novel feature.
Polaroid and ASUS also gave the idea a shot without much success. But those were niche products with little to no appeal to general consumers. Meanwhile, common modern smartphones like the Huawei P40 Pro and iPhone 12 phones are highly appealing to consumers, and also have camera zoom lenses installed inside. Instead, these phones can have embedded periscope-like lens setups that achieve the same effect without affecting looks. Other smartphone camera lenses with less complex set-ups must sacrifice focal length.
Instead, the phone seamlessly switches to the camera with the higher magnification factor. Next: Here are the best Android mobile camera lens add-ons. Digital camera zoom achieves a similar effect to optical zoom without using mechanical work or glass elements.
It will essentially cut off areas around your scene to make it seem like you are closer to the subject. The remaining part of the image is enlarged using algorithms, hence the name digital. Unlike optical zoom, digital zoom is not lossless, meaning some information from the scene is discarded in the process. Algorithms will add pixels to preserve detail in the magnified image, but this process is imperfect.
Digital camera zoom is the equivalent of cropping an image. This is why I recommend taking shots at the original focal length if you rely on digital zoom. You can always crop later if you must. Results will be the same.
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