First image of the Rokinon 300mm f/6.3 Mirror for NEX! | sonyalpharumors Compact goodness? Yes, it's a mirror lens and presumably has all the quirks/drawbacks of the genre, but it's 300mm and it's small. And Rokinon has a good reputation, so maybe they worked some magic on this and it'll actually turn out to be a decent lens. I see it for those rare times when I need more than 210mm, but I'd sure not like to shoot birds with it full time.