For those of you who are adept at the zone system I just wanted to share my awesome news. After many months of testing and far more rolls of film than I care to count, I have my numbers! I know my ISO ratings and development times for T-Max 400 24-exposure film in my EOS 1n body and my 70-200 2.8 IS lens when metered with my Pentax Digital Spot Meter. It's a rather big moment Lighting call for N-1? Got it! N or N+1? Got those too!
I'm now working on my N+2, and trying to get numbers for the 70-200 with the 1.4x extender (I have N so far).