Popular Filter Sizes that Jason uses for his lenses:

B+W UV MRC filters- these are the filters that Jason uses on his lenses to protect his glass.  They are multi coated which helps to significantly reduce lens flare.  A list is located to the right side of this picture that shows the filter sizes that Jason uses for his lenses.

Jason Lanier Models Creative Shoots

 Jason uses B+W UV filters to protect his lenses.  Using cheaper lenses leads to a loss in image quality and significantly increases the chance of unwanted lens flare.  Why spend $1,000 or more on a lens and not protect it?  A lens hood isn't enough.  Sometimes mud, rain or other artifacts are thrown towards you lens.  Jason has had many lenses saved from having a high quality UV filter on the front of the lens.  Protect your glass!