The Canon EOS 750D is compatible with Canon EF and EF-S lenses. This means that you can use a wide range of lenses with this camera, including both full-frame and APS-C format lenses. Additionally, the camera is also compatible with third-party lenses that are designed for Canon EF and EF-S mounts. This versatility allows photographers to choose from a variety of lenses to suit their specific shooting needs.

For landscape photography, a camera with a high resolution sensor and wide dynamic range is ideal to capture the details and colors of the scenery. A full-frame DSLR or mirrorless camera with a wide-angle lens would be a good choice for capturing the vastness of landscapes. For street photography, a compact and discreet camera with fast autofocus and good low-light performance is preferred. A mirrorless camera with a prime lens or a high-quality compact camera would be suitable for capturing candid moments and street scenes without drawing too much attention.

A macro lens is typically the best choice for product photography. Macro lenses are designed to capture small subjects with great detail and clarity, making them ideal for capturing the intricate details of products. They also have a close focusing distance, allowing you to get up close to the product for detailed shots. Additionally, a lens with a focal length between 50mm and 100mm is recommended for product photography as it provides a natural perspective and minimizes distortion.

A prime lens with a focal length between 35mm and 50mm is typically considered suitable for street photography. These lenses offer a natural field of view that closely resembles what the human eye sees, making them great for capturing candid moments in urban environments. Additionally, prime lenses are often compact and lightweight, which is ideal for street photographers who need to move quickly and discreetly. Overall, a 35mm or 50mm prime lens is a popular choice among street photographers for its versatility and ability to capture authentic moments.

For animal photography, a camera with a fast autofocus system and high burst rate is essential to capture fast-moving subjects. A good choice would be a DSLR or mirrorless camera with at least 20 megapixels for high-quality images. As for the lens, a telephoto lens with a focal length of 70-200mm or longer is recommended to get close-up shots of animals without disturbing them. Additionally, a lens with image stabilization can help reduce camera shake when shooting handheld in low light conditions.

For wildlife photography, a camera with a fast continuous shooting speed, high resolution, and good low-light performance is ideal. Cameras like the Canon EOS 90D, Nikon D500, or Sony Alpha a6600 are popular choices. When it comes to lenses, a telephoto lens with a focal length of at least 300mm is recommended to capture distant wildlife without disturbing them. Lenses like the Canon EF 100-400mm f/4.5-5.6L IS II, Nikon AF-S NIKKOR 200-500mm f/5.6E ED VR, or Sony FE 200-600mm f/5.6-6.3 G OSS are great options for wildlife photography.

The Samyang 14mm lens is compatible with the Canon EOS 90D camera. It is designed for Canon EF mount cameras, which includes the EOS 90D. The lens will work seamlessly with the EOS 90D, allowing you to take wide-angle shots with this combination. Just ensure that you have the appropriate Canon EF mount version of the Samyang 14mm lens for your EOS 90D.

DirectX compatibility refers to the ability of a device or software to work with Microsoft's DirectX technology, which is a collection of APIs designed for multimedia tasks such as gaming, video playback, and graphics rendering on Windows-based systems. Devices or software that are DirectX compatible can take advantage of the features and optimizations provided by DirectX to deliver better performance and visual quality. This compatibility is important for ensuring smooth and efficient operation of multimedia applications on Windows platforms.