I am about to buy an Opteka 6.5mm lens. (If you want to know why, check out my previous thread: http://www.nodalninja.com/forum/show...n-EF-s-10-22mm). I was recently looking into the lens when I found the following sentence at photozone.de:
Samyang Optics (Korea) is offering SLR lenses for many years but recently they've gained some higher visibility & popularity due to some quite exiting new products like the recently reviewed Samyang 85mm f/1.4 and the Samyang 8mm f/3.5 CS Fisheye which we'll cover in this test report. Samyang lenses are also marketed by several other companies like Vivitar (7mm f/3.5), Bower (8mm f/3.5), Opteka (6.5mm f/3.5), Walimex (8mm f/3.5) and probably a couple more.

So does this mean that the Opteka 6.5mm is the exact same as the Samyang 8mm? This is baffling me.