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Better Starter lens: Sigma 17-50mm or Canon 24-105mm

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Jorden Mosley
Better Starter lens: Sigma 17-50mm or Canon 24-105mm
on Sep 16, 2011 at 5:51:37 pm

Here are my concerns:

If I pick the Canon lens with the smaller f/4,its supposed to make keeping moving subject in focus easier. But not ideal for low lighting.

If I pick the Sigma lens with the bigger f/2.8, its supposed to perform better in low lighting, but harder to keep a moving subject in focus.

I know the price range between the two is significant, but I've accepted that investing in lens are gonna be a lot more costly than bodies. So I better invest in a good one.

Anyone have any experience with these lenses on how difficult it is to keep them in focus and how they perform under low light?

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John Young
Re: Better Starter lens: Sigma 17-50mm or Canon 24-105mm
on Sep 26, 2011 at 2:41:01 pm

I can't speak to the specific lenses you listed, but if you are asking whether to get a f2.8 or an f4 lens, I say go with 2.8.

You can always buy the f2.8 lens and set the aperture to f4 if you want deeper Depth of field. But if you buy the f/4 that is the most light and shallowest Depth of Field you can get, no matter what the situation calls for.

For my money, I don't buy a lens slower than 3.5. You can always go up in f-stop but you can only go down as far as the lens will allow.

Now as far as Canon vs. Sigma and 17-50 vs. 24-105, there are many other issues and things to consider, but the answer to your f-stop question is a resounding "go with the 2.8", (in my opinion).

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