THIS is the Best Micro 3/4 Lens for Vlogging (& Blurry Background).
Are you looking for a lens specifically for vlogging on YouTube? Are you specifically looking for a lens that provides a blurry background (bokeh effect)? If so I think I've got the perfect lens for you.
The Olympus M. Zuiko is a Micro 4/3 lens that's pretty much perfect for making YouTube vlogs, especially those that involve sitting and speaking to the camera. The low aperture means that the background of your image will be blurred and your face in full focus to give your videos a truly professional look.
There are many lenses out there, but if you have a Micro 4/3 body then I truly believe that this is the best lens for vlogging.