Bright Shadow Technology LTD.

25/10/2023

http://www.sheepdogscm.com/
See BST's optical trade service home page, you can get any need you want! Click!

A company with a background of professional optical factories, providing various foreign trade optical services.

21/08/2023

Introduction to Three Service Projects under Bright Shadow Technology
Hi, hello everyone, I am Shirley from BST.
I am pleased to introduce BST's brands and service projects here today.
Currently, BST has three major projects under its umbrella.
Firstly, BST's main business involves OEM and ODM services for optical products such as camera filters.
For over 10 years, BST has been providing OEM services to world-class camera filter brands. BST's rich research and development capabilities and manufacturing experience in the camera filter industry have given it numerous customers and a relatively excellent reputation in this field.
In 2022, BST developed two new projects based on its traditional optical research and manufacturing experience. One of them is the WOOM optical glass sunglasses project. BST successfully transplanted the camera filter manufacturing process to sunglasses and created a new 8K ultra high definition optical glass sunglasses product.
The second is to provide professional optical foreign trade services to overseas customers, from supplier search, product search, quality inspection, processing to waste treatment and other service projects, providing one-stop services for customers. Protect your optical business with our expertise.
The above are the three main projects of BST currently.
Sincerely welcome all friends to consult.

21/08/2023

Hey, welcome to see the WOOM SHG LENSES🤩🤩

07/08/2023

Sheepdog optical product quality inspection

08/03/2023

Optical foreign trade service
Sheepdog is a foreign trade service project specialized in providing optical products relative service.
When you want to start a new optical business, but are struggling to find a suitable company to provide optical services and consulting.
When you cooperate with a supplier for the first time, but lack of knowledge of its factory and need to inspect it.
When you need to carry out a full inspection of the products to be shipped, and you are suffering from the lack of a suitable quality inspection team.
When you need to test the optical product but you do not have the machine.
All the work that needs to be done on site can be done by Sheepdog for you.
Please contact snowpan@bstup.com Learn more.

07/03/2023

How to find optical product audit service in China?

When you want to start a new optical business, do you suffer from being unable to find a suitable company to provide optical services and consulting?
The sheepdog project was established in China's optical manufacturing factory. It can provide online and offline optical services for customers around the world. The service items include: factory inspection, delivery quality inspection, searching for suppliers, optical consulting and other contents related to optical services.

16/11/2022

Colorful streak filter
With the increase of video shooting, traditional UV filters, ND filters, CPL filters and other products have been unable to meet the needs of users. More effect filters appeared. This issue will introduce you to the streak filter products that are popular in the current market.
When shooting with an ultra-wide format anamorphic lens, there will be a horizontal brushed glare effect under the point light source, which can make the movie picture more unique and mysterious. Compared with the expensive anamorphic wide-screen lens, many video producers will also add a black border mask in the later stage to simulate a wide-screen effect similar to 2.39:1. The streak filter can simulate the effect of anamorphic widescreen to a large extent, so that the ordinary lens in hand can easily shoot the brushed glare effect, combined with post-production masking to achieve the effect of a movie picture.

The streak filter developed by BST has a variety of colors, such as blue, gold, green, yellow, rainbow colors, etc. Colors can also be customized according to customer requirements. Colorful streak filters make your video more distinctive.

09/11/2022

BST's new project -- Sheep Dog Optical Foreign Trade Service

A good news, BST will soon launch Sheep Dog Optical Service Project, which provides services for optical foreign trade.
We provide our customers with all services related to optical products.
If you want to start an optical business, it is difficult to have no relevant knowledge of optical products, the Sheep dog team can give strong support.
From optical product consultation, to finding suitable products and suppliers, factory auditing, product quality inspection, packaging design, audio-visual graphic material production, logistics services, product repair, product post-processing, etc. All you can think of and what you can't think of, you can talk to us.
Sheepdog has a full range of services for you.
More information, which I will publish on the Sheepdog Project's website, as well as actual service cases. I believe you will be able to find a satisfactory solution.

26/09/2022

Use of ND filter

Hi, everyone. I'm Shirley from BST. Today, I would like to talk about why we should use ND filters and what their functions are.

With the continuous development of digital post-production, many filter effects can be produced in post-production. However, ND filters are filters that cannot be completely replaced by digital post-production. When shooting water-related works, such as seas, waterfalls, streams, rivers, etc., ND filters are very important tools. When shooting these, the most important technical parameter is the shutter speed. The performance of the sea and flowing water at different shutter speeds is completely different. ND filters are the most important means of controlling shutter speed.

Common ways to change shutter speed:
Change ISO
Increasing the ISO does speed up the shutter speed, but in order to achieve the desired silky smoothness, we need to slow the shutter speed to lengthen the exposure time. Decreasing the ISO can reduce the shutter speed, but the ISO value has a lower limit, and most cameras can only reach the minimum ISO of 64, 50, and 32.

Change aperture
Too small aperture will cause diffraction effect, making the whole picture soft. To ensure the best picture quality, the aperture of contemporary digital cameras should not be less than f/16.
Too large aperture often leads to insufficient depth of field for landscape photography. For our commonly used wide-angle lenses, the picture quality of large aperture corners is also poor.
Therefore, when shooting landscape works, the adjustable range of aperture is actually very small, usually between f/8-f/16.

You may wonder why ND filter must be used? I can use stack stacking.
Yes, it is true that the stack stacking method can be used to digital post-production. But this will sacrifice our precious time. And when you have a piece of ND filter, it not only improves the efficiency, but also will get works with better picture quality. Why not? In addition, using long exposure to calm the water surface and fogging the flowing water is just a way of expression in landscape photography, while most photographers prefer to express the dynamics of water. When shooting dynamic scenes such as waves, there is no technology that can replace the function of ND filter at present, because the scene must be shot at once, and the effect cannot be achieved through post-processing.

To sum up, in order to achieve the desired shutter speed, we can only change the shutter speed through ND filters in different stops.
The most commonly used ND filters are STOP 4, STOP 6, and STOP 10.

In the next article, I will tell you how I choose ND filter based on my experience.

20/09/2022

A professional camera filter maker teaches you how to choose a camera filter - landscape photography filters

1. What are the main filters for landscape photography?
Any professional landscape photographer cannot do without camera filters. So what are the most commonly used filters?
1.1 CPL
The polarizer looks like a gray filter, which consists of two filters and a rotatable frame. Adjust the angle of use by rotating the two lenses to achieve the best effect.

Polarizers can be used to filter polarized light, which can make the sky bluer, the water clearer, and the overall picture more transparent.

In addition, one of the most important functions of polarizers is to eliminate reflected light. Filters out the reflected light that affects the picture.

1.2 ND
The ND filter is a piece of black-gray glass that works just like the sunglasses we use every day. The entry of light can be reduced.

Since the shutter speed of the camera will have a great impact on the effect of the picture, in many cases, when we cannot use the conventional means of aperture and ISO to achieve the shutter speed we need, we need to use a light filter. Different intensities of ND filters can produce different effects.

If we want to better express the movement of the waves, and when the light is strong, it is difficult for us to only adjust the shutter ISO to achieve a very slow shutter speed and accurate exposure, so this time I use Stop 6 (ND64) light reduction mirror to shoot.
Under the action of the dimming filter, the shutter speed of the camera is reduced, and the waves captured are silky smooth, so the whole picture is obviously more fluid and visually striking than when it is not used.

26/08/2022

Introduce yourself - about BST

Hi everyone, my name is Shirley from BST. In the future we will build our platform on Facebook to share content about photography and optics with everyone. I hope to communicate with people who are interested in photography, sunglasses, and optical products here.

So allow me to introduce ourselves first.
Bright Shadow Technology Ltd., referred to as BST, is an optical product R&D and manufacturing factory located in Huizhou City, Guangdong Province, China. Since more than ten years, our team has been rooted in the production and development of camera filters and we are one of the earliest factories in China to join this industry. Relying on our rich experience and independent research and development strength, we have obtained many opportunities to cooperate with world-renowned brands. Provide OEM and ODM services for 80% of the known brands on the market. BST is committed to devoting its energy to research and development, striving to be the industry leader, and refusing to follow suit and fight price wars. Because our goal is to provide high-quality and trustworthy products, manufacture more excellent Chinese-made products, and create the light of domestic products! It is precisely because of this that we are among the best in the industry.
But like many excellent manufacturing factories, a group of us who only know how to make products are not good at publicity and marketing. There is an old Chinese saying that the fragrance of wine is also afraid of deep alleys. Therefore, we hope to provide more opportunities to show ourselves through the platform of Facebook.
Back to the topic, what kind of company is BST?

※The main business of BST
1.CAMERA FILTER: Thread filter; Magnetic filter; Filter holder. Filter types include conventional Protector, UV, ND, CPL, Variable ND, GND, IR, IR CUT, Black mist, White mist, light pollution, Streak, Variable cool and warm, Color , etc.
2.Phone filter: Same as above.
3.Drone filter：Same as above.
4.Phone camera lens:Wide-angle lens, Macro lens, Telephoto lens, Portrait lens, Ultra-wide-angle lens, etc.
5.Optical Sunglasses: Standard Sunglasses, Polarized sunglasses, Linear Gradient Sunglasses, Anti-Blue Light + UV Cut-Off Composite Sunglasses, Light Pollution Elimination Sunglasses, Polarized Light + Light Pollution Elimination Sunglasses, etc.
6.Additional services in the field of optics: This is a newly launched project that provides a full range of services for all those who are conducting or planning to start an optical business.

※Scale of BST company
The factory covers an area of 2,000 square meters; more than 100 employees; professional testing equipment; professional CNC processing factory;

※Benefits for BST employees
Social Insurance include: 1.Pension 2.Unemployment 3.ON-job Injury 4.Basic Medical 5.Maternity 6.Housing Fund; Provide free dormitory for employees; health examination; meal supplement; birthday gifts; dinner; year-end red envelopes; group play activities, etc.

※BST's contribution to society and responsibility for the environment
BST is a high-tech enterprise recognized by China, and has made many contributions in the field of research and development of optical products. BST holds 46 patents. Participated in the advancement of the development of the local optical field.
The company is located in Dongjiang High-tech Zone, Huizhou, providing more jobs for nearby villagers. Enable employees to take care of their families and work at the same time.
Thoroughly implement the conservation of water and electricity, waste classification and recycling, and strictly follow the national standards for sewage discharge. Continuously improve production equipment and improve the utilization rate of resources such as water and electricity.

The above is only a general introduction to the situation of BST.
In future articles, I will share more.
If you are interested, you can leave a message or send an email to me：snowpan@bstup.com

17/05/2022

19/04/2022

17/04/2019

Am I cute?? Give me the ❤️❤️❤️!

17/04/2019

I'm not a cat,I am the Lion King!

17/04/2019

Can you count how many hairs are on it?