Forging, especially drop forging, is better than machining for several reasons. Firstly, forging produces parts with superior strength and durability compared to machined parts, as the process aligns the grain structure of the metal, resulting in increased strength. Additionally, forging can produce parts with complex shapes and intricate details that would be difficult or impossible to achieve through machining. Furthermore, forging is a more efficient process in terms of material usage, as it produces less waste compared to machining. Overall, forging, and drop forging in particular, offers numerous advantages in terms of part strength, complexity, and material efficiency compared to machining. **

The ND filter size you need will depend on the diameter of your camera lens. To determine the correct size, you can look at the front of your lens where the filter threads are located. The size is usually indicated in millimeters (e.g. 52mm, 77mm). Make sure to choose an ND filter that matches the size of your lens to ensure proper fit and functionality. **

'Nd' is an abbreviation for the word 'and'. It is commonly used in informal writing, such as text messages or social media posts, to save time and space. For example, instead of writing "bread and butter", someone might write "bread nd butter". **

No, coal does not conduct electricity better than metal. Metals are generally good conductors of electricity due to their free-flowing electrons, which allow electric current to pass through easily. Coal, on the other hand, is a poor conductor of electricity because it lacks free-flowing electrons. This is why metals are commonly used in electrical wiring and circuits, while coal is not. **

Metal conducts better than plastic because of its atomic structure. Metals have a lattice structure with free-moving electrons that can easily carry electrical charge, while plastics have a covalent molecular structure with tightly bound electrons that do not move as freely. This difference in atomic structure allows metals to conduct electricity more effectively than plastics. Additionally, metals have a higher density of charge carriers, which also contributes to their superior conductivity compared to plastics. **

Metal conducts heat better than plastic because of its atomic structure. Metals have a crystalline structure with free-moving electrons that can easily transfer thermal energy. In contrast, plastics have a more amorphous structure with tightly bound atoms, which hinders the transfer of heat. This difference in atomic arrangement allows metals to efficiently conduct heat, making them better thermal conductors than plastics. **

The ND filter that makes sense depends on the specific shooting conditions and desired effect. For bright sunny days, a higher ND filter like ND8 or ND16 would be suitable to reduce the amount of light entering the camera and allow for a wider aperture or slower shutter speed. On the other hand, for slightly overcast days or indoor shooting, a lower ND filter like ND2 or ND4 may be sufficient to achieve the desired exposure settings. It is important to consider the lighting conditions and the creative effect you want to achieve when choosing the appropriate ND filter. **

The best ND filters are typically those made by reputable brands such as B+W, Hoya, Tiffen, and Lee Filters. These brands are known for their high-quality materials, excellent light reduction capabilities, and minimal impact on image quality. When choosing an ND filter, it's important to consider factors such as the filter's density, size, and compatibility with your camera lens. Ultimately, the best ND filter for you will depend on your specific photography needs and budget. **