well had you said so earlier, I could have brought the 1.4TC let you try it out, see the range. Too bad.. next time ask AG do again then go there shoot again.chenwei said:hi tom really glad to see u there that day! i tried some with F8 (to get decent sharp pic) at between 100-200mm but background very distracting, so no choice but to try on 300mm. in fact #2 is a super big crop, think 300mm still a bit restricted.