I do quite a bit of lens testing and have recently been using Agfa APX25 - which is now impossible to find. Prior to that I had been using Tech Pan, but it's expensive, slow and a bit tricky to process so I'd like to find a more "conventional" film - plus a little extra speed wouldn't hurt! <p> Now APX25 is gone, what's the current highest resolution B&W film? I'm guessing Tmax 100 and/or Delta 100 would probably qualify. Kodak has some MTF and resolution data on their web site, but I can't find equivalent info on the Ilford site for Delta 100. From what I hear, Pan F+ has lower resolution than Delta 100 despite being a stop slower, but again I couldn't find any hard data on the Ilford site.