Bryan: Thanks for a very thorough and thoughtful review.


One question from this review and that of the 17 TS-E is I'm trying to understand the difference between the positive and negative shift value test results using the ISO 12233 chart.


Both the 24 TS-E II and 17 TS-E show considerable differences in their border and corner performance when comparing the positive vs. negative shift values (ie. +12 vs. -12 tests for the 24 TS-E II) at a common aperture.


From the test results it seems possible that the -12 shift image has the lens shifted "away" from the corner crop being shown (so the test shows a corner from further out into the lens' image circle than the normal un-shifted image border), while the +12 looks like it could be a corner crop with the lens shifted "towards" the corner crop being shown (with the corner crop now now closer to the centre of the unshifted image circle than it would be in an unshifted shot).


Am I interpreting this correctly, and if not, how should we read the results for the positive and negative shift values?


Thanks in advance...