I decided to compare two very different enlarging lenses with the same negative. Lens 1 is the 80mm f.4 Rodenstock Rodagon - APO; about a six year old lens. Lens 2 is the 135mm f. 5.6 El-Nikkor (with the silver knurled aperture ring), my guess is its about 20 years old. I bought it on e-bay for $65.00 The negative is a 6x7cm APX100 portrait of a man, taken outside in filtered sunlight. The paper is Agfa Classic Multicontrast. The enlarger is a Fujimoto 450 VC (diffusion, variable contrast head). Ilford Universal developer. Both lenses are stopped down during printing 2-3 stops. The print size was equal; 9 x 11 inches. Of course, enlarger was raised higher with the 135mm lens. The exposure times were probably within 20 percent of each other, about 20 secs. The results: These prints were indistiguishable to me. I refer to image clarity, sharpness, contrast, gradation, tonality, and every other fancy word you can think of. I am not a scientist or a very technical darkroom dude. I don't do tables and graphs and densitometers. I've only been printing steadily for about 35 years. It took me a couple of hours to do this, and frankly I'm not sure what lesson I've learned. But at least it helps me sleep a bit better knowing that my normal enlarging lens (the Rodenstock) is just fine for the job. Any thoughts??