Hiee Pals...
Above is a shot taken with the 400mm APO G on a test to see how well the continuous AF actually perform for fast moving subjects. I had tried on running races, herons in flight, and raptors too. I just want to explore the limits of the AF of the camera (locking focus + subject size factor) so took the lens out to Sengkang area and went to the swampy river and waited for birds inflight...:thumbsup:
Apparently these groups of (terns i think) birds cama by to and fro. Forgot to bring along my tripod which was in the car and I'm slowly walking along some cleared muddy tracks. Tried doing a handheld panning shoot of the birds and first were failures....(operator error). Once I get the hang of panning with this long bazooka, locking the birds in focus was quite easy.
And yes it does lock focus and movemnt of tracking must be precise (there is a learning curve to it).
From this little exercise....All I can say is that to enable AF locking accuracy for tracking/continuous AF to happen, a shallow Depth of field is neccesary (in this case the 400mm focal length @ f4.5 here). AF would have been more positive if a 400mm f2.8 was used - due to tle larger aperture for shallow DOF at the already shallow DOF 400mm focal length. Hmm...600mm f4 would be nice here!!!!!
rgds,
sulhan
Above is a shot taken with the 400mm APO G on a test to see how well the continuous AF actually perform for fast moving subjects. I had tried on running races, herons in flight, and raptors too. I just want to explore the limits of the AF of the camera (locking focus + subject size factor) so took the lens out to Sengkang area and went to the swampy river and waited for birds inflight...:thumbsup:
Apparently these groups of (terns i think) birds cama by to and fro. Forgot to bring along my tripod which was in the car and I'm slowly walking along some cleared muddy tracks. Tried doing a handheld panning shoot of the birds and first were failures....(operator error). Once I get the hang of panning with this long bazooka, locking the birds in focus was quite easy.
And yes it does lock focus and movemnt of tracking must be precise (there is a learning curve to it).
From this little exercise....All I can say is that to enable AF locking accuracy for tracking/continuous AF to happen, a shallow Depth of field is neccesary (in this case the 400mm focal length @ f4.5 here). AF would have been more positive if a 400mm f2.8 was used - due to tle larger aperture for shallow DOF at the already shallow DOF 400mm focal length. Hmm...600mm f4 would be nice here!!!!!
rgds,
sulhan
Awesome... its a staple magnetically held on a screwdriver
