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Old May 16, 2006, 7:01 PM   #1
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Hi all! I'm in London at the moment and have a possibility to buy the abovementioned lens (Canon EF100-300mm f4.5-5.6 USM).

I tried it out in the shop and it seems VERY similar in build quality and autofocus speed to my 28-135mm lens. I also have the kit lens (18-55mm) and 50mm f1.8.

So I would like to hear from anyone with advice or experience with this lens. It seems a fair bit better than the Canon 75-300 (non IS) lens, and better than the Canon 90-300, which sell for a bit less. I'm also open to 3rd party lenses (particularly Sigma).

The Canon 100-300mm also has a 58mm non-rotating front element and full time manual focusing, which I both like (can use the same filters, e.g. polarisers) as the kit lens. So I think it seems fairly decent for around 250 GBP (British Pounds)

Looking forward to your advice.

Paul
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Old May 16, 2006, 7:41 PM   #2
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This is the MTF for that lens @ 300mm:

-> The blue curves are when the lens is closed down to f/8 (i.e. @ its best)!!! :?
This is another case where an 'el cheapo' Sigma 70-300 APO can do wonder... (check its MTF) :idea:
+ it has semi-macro capability: http://sigmaphoto.com/lenses/lenses_...mp;navigator=3
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Old May 16, 2006, 7:48 PM   #3
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Hi NHL,

As usual, your answers are full of helpful advice and details. Thanks!

Yes, it doesn't look too sharp at 300mm.... though I saw the 100mm MTF chart on Canon's website and that was fairly decent... though of course with a telezoom the long end is often what one is interested in too!!! :-)

You're strong convincing might help me to end up with the Sigma 70-300 APO... (it's cheaper too). Just I'd miss the faster focussing and the 58mm convenience I guess.

Thanks again!

Paul
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