Quote:
Originally Posted by willing to learn  The reason I ask. I took some pic's of my sun playing rugby at the weekend with the 100-300mm usm. I struggled to get it working at all in any mode except TV auto focus lights did not lock and go red even in TV 
I was greatly disappointed didn't take the pump in case it got damaged it wouldn't be the first time I have been taken out on a side line  I Cleaned the contacts with a little alcohol today and it all seems to be working. With being a bit down hearted with the 100-300mm and already having the pump and not having a prime lens, I thought it would give me more options in the future when I might be able to afford one. I did manage a few pics but they are quite dark perhaps to do with shadows and high shutter speed, any less it was a blurred unfocused image. As i have said I don't think auto focus was working 100%. I suppose I will try it again to see if it was just a blimp with the camera or lens. Hand held pics below.
Regards
Colin    |
Your focus points would not necesarily light up - it depends on which mode and which points are selected. If you are in TV mode select the central focus point, then it will illuminate.
Coming to the choice of lens I have never heard anything but very positive comments about the 300mm prime lens, equally with the 1.4TC it is very good - for dragonflies for example.
I am a little puzzled why you would need this lens if you have a 100-400f5.6L IS. I use this lens regularly to photograph my son's rugby matches and it is perfect. I generally select the central or top central focus point and put it at ISO 400 and AV mode at 5.6 and shoot large JPEGS. You will find the 100-400 will snap into focus very much more quickly than the 100-300. Even in low light I have used it at ISO 800 and 1600 and have got perfectly acceptable results.
Jon