Ash, thanks for the inputs. Lovely shots with clarity and details! My favorite is #1.
From the conundrum experience in balancing between high iso and wide open apertures, if I have a chance to redo it again, I won't shy away from iso 1600 for the job followed by occasional wide open shots for the artistic, lowest lighting and perhaps other justified reason to push the lens for extra juice/speed.
1/500 sec, f/2.2, 77mm, iso 640, 0 Ev
1/160 sec, f/2.8, 77mm, iso 500, 0 Ev
motion blur, panning movement, user error? 1/160 sec, f/2.8, 77mm, iso 400, 0 Ev
For artistic shots
1/40 sec, f/2.2, 77mm, iso 500, 0 ev
1/50 sec, f/2.2, 77mm, iso 640, 0 Ev
1/13 sec, f/2.2, 77mm, iso 1000, 0 Ev
In the dance, I actually need faster than 1/160 sec for the swift movement. 1/200 sec will be safer speed to freeze the motion in the dance.
Thanks,
Hin