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The aperture (f-stop number) indicates the size of the lens diaphragm opening, which controls the amount of light reaching the image sensor. The lower the f-stop number, the larger the diaphragm opening is, hence, the more light reaches the sensor. Usually, the f-stop number specified is the one that corresponds to the maximum possible diaphragm opening.
RAM, 32GB 3GB RAM, 32GB 4GB RAM, 64GB 3GB RAM, 64GB 4GB RAM, 64GB 6GB RAM, 128GB 3GB RAM, 128GB 4GB RAM, 128GB 6GB RAM The rear cameras of mobile devices use mainly a LED flash. It may arrive in a single, dual- or multi-light setup and in different arrangements. This SAR rating shows the highest level of exposure to electromagnetic radiation measured when the device is placed at the hip level. The top SAR value for mobile devices used in Europe is limited to 2 W/kg per 10 g of tissue. This standard follows the ICNIRP Guidelines 1998 as well as the IEC standards and is determined by the CENELEC.Information about additional software and hardware features of the rear camera which improve its overall performance. Design Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications. Width The instruction set architecture (ISA) is a set of commands used by the software to manage the CPU's work. Information about the set of instructions the processor can execute. System on Chip (SoC) A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device. SoC
The Samsung Galaxy A21s has a four camera setup arranged in an "L" shape located in the corner with a rectangular protrusion similar to that of the iPhone 11 and the Pixel 4. The array consists of a 48 MP wide angle camera, an 8 MP ultrawide camera, a 2 MP macro camera, and a 2 MP depth sensor. [3] It also has a single 13 MP front facing camera, which sits in a small punch hole on the front of the screen. The rear facing cameras can record video up to 1080p in 30 fps. The front cameras can shoot 1080p at 30 fps. [4] Software [ edit ]Display The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc. Type/technology Pixels are usually measured in microns (μm). Larger ones are capable of recording more light, hence, will offer better low light shooting and wider dynamic range compared to the smaller pixels. On the other hand, smaller pixels allow for increasing the resolution while preserving the same sensor size. The SAR head rating shows the highest level of exposure to electromagnetic radiation measured when the device is held next to the ear in a talk position. In Europe, the SAR limit for hand-held mobile devices is set to 2 W/kg per 10 g of tissue. This standard is specified by the CENELEC, complies with the IEC standards and follows the ICNIRP Guidelines 1998. Networks A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other. GSM Information about the process technology used in manufacturing the chip. The value in nanometers represents half the distance between elements that make up the CPU.
One of the main characteristics of the display is its type/technology, on which depends its performance. Specific Absorption Rate (SAR) The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg. Head SAR (EU) A CPU core is the processor unit, which executes software instructions. Presently, besides single-core processors, there are dual-core, quad-core, hexa-core and so on multi-core processors. They increase the performance of the device allowing the execution of multiple instructions in parallel. Information about the number of pixels on the horizontal and vertical dimensions of the photos taken by the front camera, indicated in megapixels as well. The color depth of the display is also known as bit depth. It shows the number of bits used for the color components of one pixel. Information about the maximum number of colors the screen can display.In August 2021, It was revealed that Samsung had sold over 10 million units of the Samsung Galaxy A21s. Estimated volume of the device, calculated from the dimensions provided by the manufacturer. Applies for devices in the form of a rectangular parallelepiped.
Information about the sensor type of the camera. Some of the most widely used types of image sensors on mobile devices are CMOS, BSI, ISOCELL, etc. The Samsung Galaxy A21s SM-A217F is an Android Smartphone. It has 6.5 inches, HD+ 720 x 1600 Pixels screen resolution. And it is powered by Exynos 850 Octa-Core CPU, and runs Android 10.0. Front camera Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc. Sensor format
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Samsung Galaxy A21s is a mid-range Android smartphone designed, developed, marketed, and manufactured by Samsung Electronics as part of its Galaxy A series. The A21s line consists of SM-A217F, SM-A217F/DS, SM-A217F/DSN, SM-A217M and SM-A217M/DS. Key upgrades over the previous model, the Samsung Galaxy A20s, include the new Exynos 850 chipset and an improved camera setup. It was announced and released in May 2020. Information about the width, i.e. the horizontal side of the device when it is used in its standard orientation.
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