The so-called zoom can be literally understood as the focal length change. Friends who are familiar with the lens are not unfamiliar with the concept of focal length. The 50mm and 85mm lenses we are talking about are focal lengths. The change of focal length means the change of the size of the object in the picture and the change of focal length. When it is large, the field of view becomes narrower, and the proportion of objects in the screen becomes larger. When the focal length decreases, the field of view becomes larger, and the proportion of objects in the screen becomes smaller. So when we are shooting, we only need to turn the zoom ring to zoom in and zoom out at will, without moving our position at all.
The zoom on the camera is usually achieved by turning the zoom ring of the lens. Some compact cameras need to adjust the zoom lever on the camera to control the lens motor to achieve zoom. Different cameras achieve different zooming methods, and even some cameras can continue to zoom in after the lens zoom is stopped. What is the principle behind this? Let's take a look at it specifically, optical zoom and digital zoom.
Optical zoom
The zoom method we mentioned earlier by changing the focal length of the lens is called optical zoom. Because the principle of optical zoom is achieved by changing the zoom ring to change the position of the lens inside the lens. So in general, when we hear people zoom lens, it refers to such a lens that can change the focal length by moving the lens inside the lens.
Our common 24mm-70mm lens can be changed from 24mm to 70mm at will. We can intuitively see the change of the corresponding scene in the viewfinder. Generally, a zoom lens requires an additional zoom lens group, so it is larger in size and weight than a fixed focus lens. Different lens zoom design principles are different, there are internal zoom and external zoom, so whether the zoom can be zoomed can not be judged simply by whether the lens can be extended or retracted. For example, the lens length of the Nikon 70-200 lens does not change during the entire zoom stroke.
Digital zoom
The so-called digital zoom can be understood literally, and it is realized through the digital principle inside the camera rather than the optical principle. When digital zooming, the camera will crop the current picture to enlarge the picture. When zooming in, the camera uses an internal algorithm to fill in the pixels that are vacant after zooming in, so it is called digital zoom. The principle of digital zoom causes serious loss of image quality after zooming.
If you don't allow the camera to crop the picture to zoom, you can try to crop the finished photo with the software, and you can get the same zoom effect. If you have a high-resolution machine, you can still get better results when you take a second crop of the photos you have taken. It should be noted that the resolution of the cropped picture will be significantly reduced. When you want to print the photo after the second cropping in a large size, pay special attention to the impact of the resolution.
To sum up
The invention of zoom is of extraordinary significance for shooting. We can change the shooting angle of view without changing the shooting position. Especially for some situations where it is inconvenient to get close to the subject, the zoom lens can quickly zoom in on the subject. But we must remember the difference between optical zoom and digital zoom. In particular, keep in mind that digital zoom can impair image quality. When we bought some compact cameras, the advertisers also included the zoom factor of the digital zoom in order to increase the promotion. When you use the zoom function, the optical zoom will continue to enlarge the picture, which is actually a digital zoom. If you don't like this feature, there are generally settings to disable the digital zoom function.
Find more about optical zoom and digital zoom, click here.
Hi I am June and I am a photography nerd.
Hence I decided to write a guide about the most important features you need to know when buying the best digital camera, or DLSR.Enjoy!Megapixel ResolutionThe amount of pixels decides the size of the picture and its sharpness, particularly when printed.
You can easily convert a high-quality picture to lower quality on your PC, however you can't go from low to high.
The main questionf ro yuo: know how your photos will be used.
Details on paper are insufficient, and reviews from photographic sites are the way to go here.Optical versus Digital ZoomThe optical zoom is the real resolution of the focal points.
Wi-Fi is additionally accessible on certain cameras.Battery LifeDigital cameras has either battery-powered or standard AA batteries.
Zoom is one of the most popular communications technologies which is provided by Zoom Video Communications.
Zoom proffer video-telephony and online chat services via cloud-based software that allows the users for telecommuting, teleconferencing, social relations, and others.
It is beneficial for both small and large business purpose and one can connect with their friends, professionals or contacts together with the help of Zoom application.
Zoom is highly famous for its best in class communication features that make it popular among the billions of users.
But sometimes Zoom users also confront problems when using Zoom for varied purposes.In this article, you will learn about the most common camera problems of Zoom and their fixes in a step by step process.Read the full article here
Samsung is all set to release its new premium midrange phone, Samsung Galaxy S20 FE, in the market.
So, if you are thinking of buying a new smartphone, then you should definitely check out this fantastic premium mid-range phone.Here’s everything that you need to know about Samsung Galaxy S20 FE.
Besides this, it features a small punch hole for the camera, an under-display fingerprint sensor, a triple camera setup at the backside, a USB port (USB Type-C), a microSD card slot, a massive 4500 mAh non-removable Li-Po battery with fast charging technology (25W), etc.It also supports wireless charging/reverse wireless charging.
Besides this, it is water-resistant and dustproof and comes with 5G and Wi-Fi 6 support.
Additionally, the phone is available in six fabulous colors (Cloud Lavender, Cloud Mint, Cloud Navy, Cloud White, Cloud Red, Cloud Orange).
However, the only bad thing about Samsung Galaxy S20 FE is that it does not have a headphone port in it.CameraSamsung Galaxy S20 FE has a triple camera setup (12 MP ultra-wide camera, 12 MP wide-angle camera, an 8 MP telephoto camera) and an impressive 32 MP front camera.
Helping avoid buying the wrong digital camera and save you money for your purposes, there are 7 insider tips regarding both function or feature route.What is an Affordable Digital Camera?An affordable digital camera with remote camera control makes your budget happy, but disappoints the photographer in you.Never overlook the ergonomics of the camera.
In case you're upgrading from a less expensive digital camera, never assume that spending more or having more features will automatically make you happy.
Are counter-intuitive controls present in the new cameras?
Rather than after the purchase it is better to find out details like these before.Never get tricked by Digital and Optical Zoom-As only one matterHere's the bottom line: The only thing that is important is the Optical Zoom.
There is no impact of digital zoom on being able to take a photograph of a distant subject by zooming in on it.The only reason salespeople like to include optical zoom in the equation is because advertising loves to give you the digital camera's zoom factor.Situations When Small Digital Cameras and camera accessories are the Perfect ChoiceDespite impressions to the contrary, small digital cameras are quite popular.
They're usually loaded with features, take respectable photographs and easy to carry.Some of the pitfalls of going small include: physical size that can limit some of the available features, such as image manipulation, possible trouble physically operating some of the camera's controls, may not offer an external flash.Megapixels - What's Fact and Fiction?
Microsoft Surface Duo, after being teased online for months since its announcement in October, is finally going to launch on September 10.
The starting price of this dual-screen Android smartphone is $1,400 and it is expected to be hitting the floor with some astonishing features.
In this article, we are going to look at the specifications and important features of Microsoft Surface Duo.
If we talk about the display, then the primary display of Microsoft Surface Duo is a 5.6-inch AMOLED display and when combined with another screen, it becomes an 8.1-inch AMOLED display with dimensions of 2,700 x 1,800 which looks like a tablet and makes it suitable to watch movies or to play games.Microsoft Surface Duo is coming with a powerful Qualcomm Snapdragon 855 Processor which makes the performance of this device stunning and smooth.
However, there is no SD card slot in this device.Looking at the battery power of this device with two screens is another crucial thing.
Microsoft Surface Duo is coming with two batteries with an overall capacity of 3,577mAh.
Latest News: How To perfect Sports Photography On A Mobile Phone
There are some simple tips everybody should follow: For example, grabbing a burst of shots, for instance, is that the Spotts Photography equivalent of casting a good internet – unit of ammunition can doubtless be on-point.
Sports Photography Get Know Your Smartphone Optical zoom
Sports Photography News Digital zooms, as found on the constituent three, for instance, square measure inferior on paper as they merely crop into a regular image, making a lower resolution shot by simply delivery an equivalent quantity of pixels nearer to your eyes.
Optical zooms, in distinction, have lenses that act like magnifying glasses, that the image that the phone captures through associate degree optical lens is each nearer to your subject and packs all the detail of a full-resolution image.
This means, if your phone solely has one camera, keep on with fisheye shots; or at the terribly least, don’t get trigger-happy once pinching to zoom.
