So frustrated! Can't get Telex/Sankor 16-D to work on APS-C/S35!

Hey guys, first post here in the forum! I sprang for a Telex 16-D adapter last year, which as far as I could tell is a rebadged Sankor, and I can't get it to not vignette on my Nex5N's. Tried Minolta 50mm 1.4, Konica 50MM1.7, and Nikon 50MM 1.8, still get hard vignetting. Can't seem to find any information about a good taking lens for the Sankor 16-D on APS-C, all the posts here are about MFT or FF cameras. Sounds like I should try a 58-60mm taking lens, or only shoot on MFT through it. Helio

Hey guys, Thanks for the helpful replies. Ken, this is the first time I have heard that some 2x anamorphics are wider than others? Do you mean the angle of FOV, or the width of the rear element? To clarify, from what I understand, the rear element of the anamorphic needs to be larger than the front element of the taking lens, otherwise it will vignette? From what you're saying, sounds like the 16-D is a lost cause on S35, I'll have to shoot MFT only on my adapter. I'm frustrated be