You asked

Is the canon ef 8 15mm f 4l fisheye usm good for vlogging?

Not really. The Canon EF 8-15mm f/4L Fisheye is a very wide fisheye zoom, and the video guide suggests a wide lens of about 16-20mm full-frame equivalent for vlogging. This lens reaches that range only on APS-C, where it frames like 13-24mm. Even there, fisheye distortion will bend your face at arm's length, and the lens isn't stabilised, which matters when you're holding a camera for minutes at a time.

If you already own a Canon EF body that fits it, it can work for wide landscape or creative shots. For talking-head vlogging, look for a lens closer to 16-20mm equivalent. The video guide also covers what else to prioritise, such as a flip-out screen and a microphone input.

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