Consumer Electronics

As an auxiliary tool, flashlight is basically indispensable in commercial photography, regardless of portrait products, cars, etc., and in ordinary personal creation, it should be determined according to your personal needs. There are many things that can be discovered and shining in a portrait work. From a model point of view, you can create works from expression management and action performance, or express with makeup skills and clothing matching. From the perspective of the scene, you can complete the idea of shooting by choosing the venue, choosing the right time, and adjusting the composition. You can also use props to enrich the story and creativity of the scene. In terms of equipment and parameters, the first thing to do is to face the choice of lens focal length, exposure setting, and viewing angle. Each choice corresponds to a different result, and a different style can be formed.

backpack:
The most common photography package. Advantages: you can carry more equipment, because the shoulders are lighter, you can walk long distances, and the speed of taking out the equipment is moderate. It is suitable for a variety of themes, such as travel, scenery, humanities, weddings, outdoor, and daily commuting with specially designed backpacks.
One-shoulder messenger bag:
Carry on one shoulder. The equipment is taken directly and quickly, but one shoulder is heavier. More suitable for urban humanities.
Shoulder bag:
The speed of fetching equipment is also relatively fast, but the carrying feeling is better than that of a one-shoulder messenger bag. It is also more suitable for urban humanities.
Roller luggage:
A large amount of equipment can be used, and equipment protection is the best. It feels like you can bring all the equipment in your entire studio. This is suitable for the studio to bring a lot of equipment to complete photography tasks with little movement, such as shooting ceremonies, meetings, etc.
Lens barrel:
Mainly put a single lens, and then put it in other big bags, and some can be hung on the belt. It is highly mobile and can be flexibly matched according to many occasions.
In addition, each type of bag has differences in size, carrying system, waterproof and anti-theft, accessory space design, access to equipment, expansibility, and appearance design. Different designs and differences allow each package to adapt to different application scenarios.

In fact, if you are not particular about it, ordinary backpacks can also hold cameras. But… Ordinary backpacks do not have a protective layer of the inner tank, and they may bump into and damage the equipment when putting down the backpack and walking around. The camera bag has a good protective outer shell and inner liner, which can protect your heart, liver, and baby from damage. Ordinary backpacks are not designed for photographic equipment, so the space utilization rate is very low, because most of the photographic equipment is not square and square, a large bag can not fit a few pieces of equipment, and there is also concern that the equipment will be damaged by friction. The inside of the camera bag is reasonably separated according to the shape of the photographic equipment, and every inch of space can be used as much as possible. There are buffer partitions between the equipment to protect them from fighting each other and causing damage. Ordinary backpacks can only take equipment from above, while quick photography backpacks can quickly take photographic equipment from the side, which greatly facilitates the photographer to grab the lens. There are also anti-theft, waterproof, etc…

Non-stick fingerprint, frosted feel, anti - wear anti - scratch. The lens frame protection function is only 0.4mm thick, which reduces the thickness and weight as much as possible, restoring the most real hand feeling. PP is used in the material to prevent oxidation and yellowing. The case also supports three other models, which can be selected in different sizes. This one is a transparent hard case that protects the phone while showing off the iPhone's original color scheme. Of course, the case is very important for the protection of the phone, so this case also adds shock-absorbing air cushion at the corners to absorb energy in the event of impact. Increased the protection level of ai machine by one gear. It's one of the things we've been complaining about is the camera being ground up. The bezel on the camera is slightly higher than the camera, giving the camera an extra scratch-off design. Liquid silica gel protective case is excellent in hand feeling, excellent in toughness, soft and shockproof. Slight shortcomings, itself easy to absorb ash, and not scratch resistant, poor thermal conductivity, not easy to heat. Advantages and disadvantages coexist. If you don't play games much, you can consider a liquid silicone shell, which can give you a good touch experience. Soft plant fleece is also provided inside to protect the glass cover on the back and prevent scratches. Non-stick fingerprint, frosted feel, anti - wear anti - scratch. The lens frame protection function is only 0.4mm thick, which reduces the thickness and weight as much as possible, restoring the most real hand feeling. PP is used in the material to prevent oxidation and yellowing. The case also supports three other models, which can be selected in different sizes. This one is a transparent hard case that protects the phone while showing off the iPhone's original color scheme. Of course, the case is very important for the protection of the phone, so this case also adds shock-absorbing air cushion at the corners to absorb energy in the event of impact. Increased the protection level of ai machine by one gear. It's one of the things we've been complaining about is the camera being ground up. The bezel on the camera is slightly higher than the camera, giving the camera an extra scratch-off design. Liquid silica gel protective case is excellent in hand feeling, excellent in toughness, soft and shockproof. Slight shortcomings, itself easy to absorb ash, and not scratch resistant, poor thermal conductivity, not easy to heat. Advantages and disadvantages coexist. If you don't play games much, you can consider a liquid silicone shell, which can give you a good touch experience. Soft plant fleece is also provided inside to protect the glass cover on the back and prevent scratches.

A camera is a machine that converts optical image signals into electrical signals for storage or transmission. When we shoot an object, the light reflected on the object is collected by the camera lens, so that it is focused on the light-receiving surface of the camera device (such as the target surface of the camera tube), and then the light is converted into electrical energy by the camera device, which is obtained "Video Signal". The photoelectric signal is very weak and needs to be amplified by a pre-amplifier circuit, and then processed and adjusted by various circuits. The final standard signal can be sent to a video recorder and other recording media for recording, or transmitted through a propagation system or sent to a monitor show.

The camera uses visible light for imaging. When the light molecules of various visible light reach the CCD (photosensitive device) of the camera, the image is presented through electronic technology. When the light intensity is better, the camera's imaging is also better, but as the illuminance (intensity) of the light decreases, the imaging also becomes worse. The main manifestation is that the appearance of "noise" increases and the image also increases. It becomes blurred (such as the change of camera image at dusk). As the illuminance of the light weakens further, the color camera can no longer image.

These interfaces of the mobile phone are connected to the inside, and dust can enter the inside of the machine, and dustproof design is required.
Some mobile phone users have received their new mobile phones and are scared in their palms. Protective shell, screen film, dust plug, lens protector. The complete set of equipment is fully installed. The protective shell and the screen film are understandable, after all, they have a great protective effect on mobile phones. But the dust plug is really inconvenient during use. The wired headset is connected to the charging port and a dust plug is added. The dust plug can come and go freely every day.

Wireless charging is to realize the energy transmission between the power supply and the electric equipment in a non-contact wireless way. Currently available wireless charging technologies include electromagnetic induction, magnetic resonance, radio wave, ultrasonic, infrared laser and electric field coupling. The most widely used wireless charging technology is electromagnetic induction, which has the advantages of high conversion efficiency and short-distance charging. The principle of electromagnetic induction technology is that a changing current flows through a coil to generate a changing magnetic field, and the paired coils are coupled to generate a corresponding voltage for charging.

Among them, electromagnetic induction is the most used technology in the current mobile phone market, and magnetic resonance technology has huge future potential and is expected to become the mainstream technology. The principle of electromagnetic induction is that the power transmitting coil and the power receiving coil are built in the charging base and the mobile phone terminal respectively. When the two are close, the transmitting coil (transmitting coil) is based on the alternating current of a certain frequency in the mobile phone receiving coil (receiving coil) ) Generates a certain current, thereby transferring electric energy from the transmitting end to the receiving end, and supplying power from the charging dock to the mobile phone. The electromagnetic induction method is relatively simple to implement and is currently the most mainstream solution in mobile phones. The main problem is that the transmission distance is severely limited. Magnetic induction wireless charging can only support one-to-one wireless charging, and it has defects such as low charging power and short charging distance. In order to achieve one-to-many wireless charging, improve power and have more flexible and free charging distances, magnetic resonance wireless Charging has begun to receive industry attention.

Speed: This is where SSD shines. A PC equipped with an SSD will boot up in a few seconds, of course within a minute. Hard drives need time to speed up operating specifications and will continue to be slower than SSDs in normal operation. PC or MAC and SSD boots are faster, start applications faster, and have higher overall performance. Using SSD drives on laptops and desktops, you can see higher PCMAMS scores, plus the much higher scores and transfer times of external SSDs and HDDs. Whether it's entertainment, school or business, the extra speed may be the difference between completing on time or failing. Fragmentation: Due to their rotating recording surface, HDD surfaces work best with larger files placed in adjacent blocks. In this way, the drive head can start and end its reading in one continuous movement. When the hard disk starts to fill up, large files will be scattered around the disk, which is called fragmentation.

A traditional spinning hard disk drive (HDD) is the basic non-volatile memory on a computer. In other words, when the system is shut down, it will not "walk away" like the data on the system memory. Hard disk drives are essentially metal disks with a magnetic coating. This coating stores your data, whether it comes from weather reports from the last century, a high-definition copy of the "Star Wars Trilogy," or your digital music collection. In a hard drive, the read-write head on the disk accesses the data.

Both SSD and HDD do the same job: boot the system, store applications, and store personal files. But each type of storage has its own unique set of characteristics. The question is, what is different and why do users get one more than the other? Let's break it down: Price: To put it bluntly, SSDs are very expensive in dollars per GB. For an internal 2.5-inch drive with the same capacity and form factor of 1TB, you will pay about $75 for a hard drive, but in this article, the SSD is a huge $600. This means 8 cents per GB for HDD and 60 cents per GB for SSD. Other capacities are slightly cheaper (250 to 256GB: $150 SSD, $50 HDD), but you know the idea. Since hard drives are older and more mature technology, they will keep their prices low in the near future. These additional hundreds will push your system price beyond budget.

In theory, the USB charging cable only uses two wires for power supply (VBus) and ground (GND), and does not involve data transmission, so basically the USB charging cables are similar.

But in fact, it’s hard to say, because the cores of USB cables of different qualities are very different. A better line has more copper wires in the core, but a lesser line has very few copper wires in the core. , Even I have seen only one or two roots. If the quality of the core is poor, it will definitely affect the charging, especially if the output current is more than 2A, the resistance of the poor quality line will be larger, and there is a risk of overheating and fire, and the poor line charging speed It will be slower.