Another enlarging lens that I picked up is the Rodenstock Rogonar-SC 50mm f2.8. Will be interesting to compare this one with the EL-Nikkor 50mm f2.8.
Brothers - Componar 50mm f4.5 and 75mm f4.5. Click for larger.
I am happy to say that the 75mm f4.5 Componar is much better than the 50mm f4.5, in terms of optical quality, especially the corners. It's very sharp wide open, similar to the Schneider-Kreuznach 75mm f4 (why do they have so many enlarging lenses of the same focal length?). I do notice the square bokeh is less pronounced than the 50mm f4.5, maybe the longer focal length has less depth of field.
Wide Open it looks normal - NEX-5N & Schneider-Kreuznach Componar 75mm f4.5. Click for larger.
Super Sharp - NEX-5N & Schneider-Kreuznach Componar 75mm f4.5 @ f5.6. Click for larger.