The brands of SLR cameras are:

1. Canon: Founded in Japan in 1937, it is the world's leading comprehensive group that produces imaging and information products and a Fortune Global 500 company.

2. Nikon: Founded in Japan in 1917, it is a world-famous designer and manufacturer of optical products and an industry-leading brand company.

3. Sony: Founded in Japan in 1946, it is a leading global high-end imaging brand, a world-renowned brand, and a leader in the information technology industry.

4. FUJIFILM: Founded in Japan in 1934, it is one of the world's largest manufacturers and suppliers of comprehensive imaging information and document processing products and services. ?

5. Samsung SAMSUNG: Founded in South Korea in 1938, it is a Fortune 500 company in the world, a leading company in the global consumer electronics field, and a leader in the global electronics industry. ?

6. Casio: Founded in Japan in 1957, it is a large multinational group company, a world-renowned brand, and one of the top ten brands of digital cameras. ?

7. Panasonic: Founded in Japan in 1918, it is a Fortune 500 company, a world brand, a large multinational company, and one of the world's largest electronics manufacturers. ?

8. PENTAX: Founded in Japan in 1919, it is a world-famous SLR camera brand and a leading imaging instrument manufacturer.

9. Olympus: In Japan in 1919, it was one of the top ten brands of digital cameras and one of the representative companies of precision optical technology in the world. ?

10. Leica: Founded in Germany in 1907, it is one of the leaders in the world's optical manufacturing industry. It has a 160-year history of manufacturing microscopes and is one of the top ten digital camera brands.

Extended information:

Single Lens Reflex Camera (Single Lens Reflex Camera, abbreviated as SLR camera) is also called a SLR camera. It refers to a camera that uses a single lens, and the light shines on the reflector through this lens, and the view is taken through the reflection.

The so-called "single lens" means that the photographic exposure light path and the viewing light path use one lens. It is not like a rangefinder camera or a double-lens reflex camera that has an independent lens for the viewing light path.

"Reflection" refers to a flat reflector in the camera that separates the two light paths: the reflector falls down when taking a view, reflecting the light from the lens to the pentaprism and then to the viewfinder window; the reflector quickly lifts up when shooting. From now on, light can shine on the film or photosensitive element CMOS or CCD.

Reference: Baidu Encyclopedia-Single Lens Reflex Camera