Is the lens of telephoto camera lens universal?

Not universal
The telephoto camera lens is not universal. telephoto camera lens lens typically has a specific focal length and angle of view, suitable for specific shooting needs and environments. Different types of cameras (such as DSLR cameras, mirrorless cameras, etc.) may require different types or brands of lenses, so telephoto camera lenses are not universal.
Characteristics and applicable scenarios of telephoto lenses
The telephoto lens has a longer focal length and a smaller viewing angle, making it suitable for capturing objects at long distances. They can bring distant scenery closer together, filling the picture with details, and are commonly used in portrait photography and sports events that require highlighting the subject. Telephoto lenses typically have a larger aperture and shorter depth of field, which can blur the background and highlight the subject during shooting.
Compatibility of lenses for different types of cameras
DSLR cameras: typically use EF mount or EF-S mount lenses. EF mount lenses are suitable for full frame DSLR cameras, while EF-S mount lenses are suitable for APS-C format DSLR cameras. By using adapter rings, some EF or EF-S mount lenses can also be used on RF mount full frame mirrorless cameras.
Mirrorless camera: lenses with RF mount, designed specifically for mirrorless cameras and not suitable for DSLR cameras.
Compatibility of lenses for different brands of cameras
Camera lenses from different brands are usually not interchangeable. For example, Canon lenses cannot be directly used on Nikon or Sony cameras unless specific adapters or adapters are used, which may affect the performance and functionality of the lenses.