Hi everybody,

I have a 450D with twin lens kit.

Looking at lens options mostly for outdoor birds etc.

I have seen a lot of good reviews for the Tamron SP 70-300mm f/4-5.6 Di VC USD

My question would I see much difference over the canon 55-250, will I notice the extra 50mm ,as I do find occasionally I wish I had more zoom, and would there be any noticeable difference in the quality of the images between the two.

Thanks David.

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