I am in the enviable postion of having too many enlarging lenses. I currently have an ancient Beseler 4x5 enlarger. I own a 150mm EL-Nikkor 5.6 lens, a 135mm Schneider Componon-S 5.6 lens, and a Schneider 80mm Componon-S 4.0 lens. Recently I won an auction on a Saunders 4500 VCCE outfit (yeah!), and it comes with a whole batch of lenses: Rodenstock Rogonar-S 1:4.5 f=105mm; Rodenstock Rodagon 1:5.6 f=105mm; Rodenstock-Omegaron 1:4.5 f=150mm; Rodenstock-Omegaron 1:3.5 f=50mm and El Nikkor 1:2.8 f=50mm The lenses from the auction are pictured here: http://i18.ebayimg.com/02/i/07/c3/82/3e_3.JPG Here is my question: I don't do much 35mm, but just in case, I guess I'll hang on to the 50mm lenses. 90% of my work is in 4x5, with a bit of medium format occasionally. Which of the lenses above, would you hang on to, and why? I don't know much about the Rodenstock lenses, and how they compare to my current lenses, although, I have liked the results from my 150mm Nikkor lens.