I really wouldn't be so concerned about AF
- the 70-200 is quite easy to use in MF
mode. Even without convertors, there are always going to be situations where using manual focus is quicker and more reliable than AF
, and it is a skill every photographer should acquire.
Even though the D30 will technically AF
with the 70-200 & 1.4x, it will be slow and probably unreliable on moving subjects.
Through necessity (2x & 300mm f4 10D/D60) I often use manual focus, however, last weekend I was shooting with just the 1.4x convertor, so decided to let the AF
have a go. Overall results were much worse on moving aircraft than had I stuck to MF
. Never again.
Colin K. Work, Pixstel