Quote:
Originally Posted by mep916
My wife was discussing a photography contest with me - a MySpace contest - so I asked her about the lens weight issue. She seems to believe that a heavy lens wouldn't be a problem, so I'm gonna eliminate that as a negative, or deciding factor.
The "F" value of the lens determines the distance that the lens can reach. Is that correct? So, if she wanted to take an up close shot of, say, a flower, a lens with a lower "F" value would be better. For a long distance shot, a higher F value is what you would want. Is that right?
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That's great to hear.
The F# or aperture setting is one function that determines the amount of light coming into the camera, as well as controlling the depth of field (DOF).
So the lower the F#, the better the lens is for low light shooting. So the Sigma 70-200 2.8 would be the best in that regard. However it doesn't have the extended reach of the Sigma 120-400. If it was up to me, I would say she would benefit more from the 120-400 for the sheer versatility of it, but your starting at 120mm, so you are missing the lower focal length with can be annoying.
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