What lens is better for Canon EOS 7D SLR camera to shoot meetings?

According to my experience, considering indoor shooting, a wide angle of 28mm is needed, so the wide-angle end cannot be greater than 18. If the conference room is large, it is necessary to make a close-up of the speaker's head, and the focal length will be longer. 18-55 is definitely not enough. 15-85, 17-85 and that 18- 135 are all practical. Suggest choosing here. Take pictures of the unit, these headshots are enough.

If you really want to pay attention to image quality, zoom is not qualified to discuss image quality. If you are not very picky about image quality and Jiao Wai, you can consider the small white category.

The telephoto lens recommendation 135L is one of Canon's three best L-heads. Fixed focus is equivalent to 2 16mm on APS-C. But in fact, telephoto is not commonly used. I suggest playing for a while first, and I think it's not too late to reinvest.