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Received my Tamron 17-70mm today...

Started 9 months ago | Discussions thread
jhorse Veteran Member • Posts: 5,913
Re: Received my Tamron 17-70mm today...
1

BeatX wrote:

Yes, I know that f/2.8 lens is still an f/2.8 lens, but my point is that comparing two lenses like: Tamron 17-70/2.8 vs Canon 24-105/4 IS L (closest competition) will give exact same results when they are used on APSC body vs FF body.

Is this correct? I do not think so. There are two aperture comparisons: depth of field and light gathering ability. In some circumstances a f2.8 can gather more light when set to f2.8 and thus for a give ISO can provide different, aka, better results.

This is my understanding if equivalence. Why do you think they give the 'exact same results', implying under all circumstances?

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