I have old D2 enlarger with Omegaron f4 135mm lens for my enlargement printing f rom my 4x5 sheet film. It is OK for enlarging the image to 11x14. However, it is not sharp any more on 16x20 paper. Should I buy better 150 mm lens? Is any one knows the quality of Omegaron lens (actually it is a Rodenstock lens)? Are enlar ger lens very important for making good quality prints. Thank you very much for your assistance.
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