hello and sorry if this is such a dumb question.
I was trying to shoot a flame, (mid afternoon and indoors)
using my 50d with 70-200mm at f2.8
i wanted a of around 800 as i was trying to capture
the flame in action and yet blurr all the background. my camera would not allow this setting, it kept blinking the "no can do".
I tried all settings, manual, av, tv and the only way i could shoot was with a very slow .
I also tried moving up and down from 100 up to 1250 (just for curiosity sake) and still could not shoot at these settings.
What am i doing wrong ?