I was planning on getting a focusing screen in attempt to create a 35mm Adapter for personal experience, got all the parts but I was about to purchase this Beattie but on the picture, it says "plain matte" but I can sort of see a little circle. Now will this circle show up on the image?? Because the rep at B&H said the clear circle is on the Nikon D Focusing Screen too and I've never seen it projected on other's Nikon D adapters or does he just not know what he's talking about??