Congratulations my friend! enjoy it

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_{Don't let the truth gets in the way of your paranoia...}

I will be sure to London in 3 days time

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dont be foolish........ why sell and buy something, that is in the long run, is not as good.... unless you have a faulty lens there is no reason it wont last and be taking amazing pics on your next body.... i never had any trouble with the thing on my 20D and it blows me away on my 5D... so keep it and just shoot at f4 if you feel its a bit off over that...

enjoy the 40D, the flash probably seems better because the running gear in the 40D is slightly better tuned than a 350D.....

just my 2 bits!

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If i knew how to take a good photograph I'd do it every time
I want a Hasselblad H1D

Do you have any samples that yours has taken at 2.8 mate? I'd be interested in seeing as I am just not convinced the lens is faulty (well both in fact!) since I've been reading many user reviews about the f4 being more sharper at f4 than the 2.8 at f4 and the F4 having new glass elements to better control flaring.

Also considering the F4 L IS has a 4 stop IS gyro setup compared to the 3 stops of the 2.8 makes it more ideal at f4 and half the wiehgt in total for me.

These are the 2 main criteria I made my decision to get the F4 instead really :/

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was your f2.8 new........
ill digg up the shots i took when i first got mine and was testing it on my 20D... u can judge..... i know nothing of the f4 havin been totally satisfied with the 2.8
ill get them up in my scraps and let u know!!

bummer if u got a dud

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If i knew how to take a good photograph I'd do it every time
I want a Hasselblad H1D

Congratulations on the new camera!

Don't be so quick to dismiss that f2.8 yet. It is a workhorse of the professionals for a good reason. Very popular with wedding photographers. The difference in IS between them in practice doesn't seem to be all that much (especially as the 2.8 is a full stop brighter).

It can also be coupled with teleconverters, when needed.

If you will not be shooting in dim light or not need as shallow depth of field as possible then go for the f4, but if you want as fast a shutter speed as possible, need to work in low light, avoid higher ISOs or want to do portraits (typically with shallow DOF), then you may want to hang on to the 2.8.

If none of that matters and you're wanting a lighter lens (a blessing for hand holding) for working with then f4 would likely be good too.

It is a hard choice at times.

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"Never attribute to malice that which can be adequately explained by stupidity." ~Hanlon's Razor

"Dad said it wouldn't hurt and that it was just for a bit but when the pictures were all done my holes felt so sore :C" =MarieChan

if it's a dud batch the camera shop had then indeed it's a bummer but after a swap I'm not up for swapping for another as all their batch could be soft copies :/ - I know for fact the F4 is sharper at F4 than the 2.8 at F4 and has the newer IS system as well as new glass elements to minimise flare and CA. Selling it and buying the F4 also puts some extra money in my pocket

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Indeed a hard choice! I keep taking out the 2,8 to test with samples etc but keep getting put off when I fire up the PC and seeing the flaring!

Now if it is a lens fault I would not mind sending it to Canon for recalibration or repair if it can be fixed which is why I'm after samples at 2.8 from other people first

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I have not heard of flaring being such an issue before. I suspect this might be a good candidate for a complaint to Canon.

Pbase is a good hunting ground for samples. [link]

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"Never attribute to malice that which can be adequately explained by stupidity." ~Hanlon's Razor

"Dad said it wouldn't hurt and that it was just for a bit but when the pictures were all done my holes felt so sore :C" =MarieChan