So im new to anamorphic shooting, and I have a few questions that would be awesome if you guy us can clear up for me! The isco ultra star is the most affordable option for me right now. However there are a multitude of options on eBay when it comes to cinemascopes.. 1) does focal length matter? There are ones that range from 40mm to 80mm and up, what is the difference and does it matter? 2) some ultra star cinemascopes have the blue star logo and others don't. Is there a difference?