Hey gang. Finally am getting over this cold,so i went out on a driving tour yesterday. For just about all of the 450 odd frames shot so far, i have used either my A 28 or A50 with the odd Sigma 100-300 or the Pentaz PZ 28-105. I had the 28-105 on the istD for some icefishing shots on Lake Simcoe and i found a sporatic snag using it. Just womdering if anyones else had this happen or offer an explanation. At both extreme ends,28 and 105,sometimes when i try and AF on the subject,(infinety) i can hear the lens TRY and focus. It makes a noise but nothing happpend. The red focus dot comes on and the green focus confirmation light just blinks and the lens tries to focus. If i move it off 105 or 28 just a tad,it focuses.
However it does not do this everytime. I tried it on a good contrast scene and it di it then to. Any ideas.? Battery idicator shows full. I have AA Liths in ther now,with about 400 shots. I tried the Sigma 100-300 and it does not seem to have this problem(so far) Dave