I'm currently using a componon-s for enlarging 4x5 on my D2 w/chromega head. I don't think it's the latest model but it's not that old. I usually use it stopped down to 11 or 16. I think my prints should be sharper. My prints are usually 11x14 or 16x20. I've read tests that say my schneider isn't the greatest when put next to some others. Would the 150mm Rodenstock Rodagon be a better lens for me?