On Sat, 13 Jan 2001, Karen Nakamura wrote:
> I have an EOS-3 with the 75-300mm F4-5.6 IS lens. I can tell
> you that the focus tracking on that lens is pretty spectacularly
> bad, even with a high-end body. The poor motor just isn't fast
> enough or smart enough to lock onto targets. I usually switch to
> manual focusing when I'm out on the 300mm end. I've been greatly
> disappointed by the softness of this lens at 300mm. Sigh.


Hi Karen,

Your make an interesting observation that the EOS 3 doesn't AF
well with a lens slower than f/4!  I think the central sensor
only detects horizontal lines when using your 75-300 lens or
the 28-135 IS

Did you try any shots with the lens aperture stopped down using
either tripod to flash to remove camera shake?

Cheers
Julian Loke

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