At 11:55 PM 2001.04.27 -0700, you wrote:
>Hello there:
>
>I just rented an EF 300/2.8L IS USM lens in order to shoot a friend's judo
>tournament. I needed the extra focal length since I'll have to shoot from the
>seats and the faster glass since it'll probably will not be well lit. (I plan
>on using Fuji Press 800 normally rated and/or pushed +1 and/or Kodak T-Max
>3200)
>
>The question I have is that when I started to play with the lens and attached
>either my 1.4X or 2.0X teleconverter, my EOS-3 seems to "hunt" quite a lot
>before achieving focus. (and yes, I had the focusing limiters set
>correctly...)
>
>Just to check I tried to focus with the same camera, the same target and in
>the same light with my 70-200/2.8L and the same (my) converters. The
>70-200/2.8L seems to "snap" into focus a lot faster.
>
>To be honest, I have never shot with a 300/2.8L (IS or not) and therefore I
>don't know if this is normal and the 70-200/2.8L should focus a lot faster
>(less glass to move?) or if there is something that I am missing...
>
>BTW, I did not get an instructions manual with the lens and if I remember
>previous posts correctly IS mode 1 is for normal IS utilization and IS mode 2
>is for use when the lens is either being panned and/or on a tripod.
>Is this correct?
>
>Thank you in advance...
>
>Regards
>
>Carlo Terlizzi
>[EMAIL PROTECTED]
re: focus overshoot:
What brand of teleconverters are you using, non-Canon units cause these
lens to focus too fast, and overshoot the target, the Canon extenders slow
the focus down, I have never had a problem with either my current IS or
previous non-IS version of this lens on an EOS-3 provided I keep to the
Canon extenders. On the otherhand, if I used a Tamron 2x converter it
can do some wild hunting with lower light levels.
re: modes
Yes mode 2 is for horz panning, however if you are in mode 2 and keep the
lens steady while IS is running, it automatically switches back to mode 1
in a couple of seconds. Either mode is for Tripod mount, however unless
you have a gimbal mount, generally you are not panning on the tripod. so
use mode 1.
Edward Agnew, P.Eng., VA3 EGA
Agnew Technologies Inc.
Electronic Engineering and Stock Photographic Services
Campbellville, Ontario Canada
Voice: 905.659.0429
Fax: 905.659.0474
http://www.agnew-tech.com
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