The canon cn e50 t13mm l f cine lens is a lightweight 13kg compact fixed focal length lens designed for great low light performance and fine creative control over focusing and depth of field this lens has been designed for use with canons c series cinema cameras eos c100 c300 c500 and canons range of full frame dslrs with an ef mount such as the canon 5d mark iii 1d x and 1d c