It should. I don't have the Trigor but I do have a 14" Kern Gold Dot Dagor.

My "envelope" calculations say that the diagonal of 8x20 is about 21.5" (In reality a bit less than this), and for a 14" lens to cover, it needs to cover about 72.5 degrees. I can't imagine a Dagor not covering 72 degrees sharply, even with the rumors of reduced coverage in the Kern lenses.