I am going to buy a 150 mm. enlarging lens, mainly for B&W printing. I will choose between Rodenstock Rodagon, the normal one and the APO version.
On the better performance of the APO I read and heard opposite opinions. The M TF graphs show that the non APO has more regular performance (the lines are stri ght), with also a better resolution for the 40 l/mm line (the one supposed to gi ve a microcontrast index).
Does anybody make real direct comparaison between these APO and non APO lenses?
Which one is the best? From what enlarging ratio on?
I am not talking about a better reolution under a 6X loupe over a 20"x24" print, but a visible (even if slight) difference of this print hang on the wall.
Thanks to all.
Diego Rigatti (Milan, Italy)