Which lens to choose for the SLR concert?

The development intention of DO multilayer diffractive lens is to reduce the volume and weight of telephoto lens, not to improve the imaging quality.

If you take some photos for commemoration or online communication, you can say anything. 200mm can take a single photo of the singer, and 300mm can't take a close-up of the face, so there is little difference.

Stage photography requires large lens aperture and high ISO quality. Anti-shake can only reduce the influence of your jitter, while the movements and expressions of performers on the frozen stage can only be guaranteed by high-speed shutters. On the other hand, the stage lighting is complex, and the illuminance changes widely and quickly. Only a large aperture can ensure a certain focusing speed and accuracy, and only a large aperture+high ISO can ensure that the shutter time is always short enough.

The best stage photographic equipment IS 300/2.8L USM, 200/2L USM, followed by "Xiaobai" 70-200/2.8L (not necessarily IS). Sigma "Big Black" 100-300/4 is also a good choice, because the 300 end has F4 aperture. 135/2L is suitable for close-up stage photography.

The aperture of 70-300/4-5.6 and 70-300 DO is smaller than F4 at the 200-end, which is not as USM as EF 70-200mm f/4L.

Stage photography uses a monopod to support a thick telephoto lens with a large aperture, and the hand rest is too much. People who say they use tripods are idiots.