I recently picked up a 150mm Schneider Componon-S in a lot at a garage sale. I intend on mounting the lens onto a Omega DII but i do not have the correct lens plate for this lens. On the Schneide web site it states that the lens has a 50mm thread but the one i have the threads are on the rear element of the lens, the one shown on the web site the threads are on the main body of the lens so i think that the older Componon-S has a different thread size. I have a blank lens plate that i can drill out, but I don't know correct size hole to make or the correct size jam nut to purchase. The nuts i have found listed are a 50mm size. Any one know what the specs are for an older 150mm Componon-S?