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Old Jan 6, 2004, 8:35 AM   #1
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Default Sigma Zoom Lenses

I'm still looking for a little insight on getting a good zoom lens for sports shots. Below are the 2 lenses I'm looking at. Which would be the better option?

Sigma AF 4.0 100-300mm EX (HSM)
Sigma AF 2.8 70-200mm EX (HSM)

Also, is a TC advisable for either lens. If I go for the 300, am I going to be able to use it without a tripod? Thanks in advance for your input. Given the $$ we're talking about, I don't want to make a mistake.
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Old Jan 6, 2004, 8:44 AM   #2
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IMO the AF 2.8 70-200mm EX (HSM) is more flexible beside having a faster f/2.8... which allow you to maintain AF with both 1.4x or 2x TC (you'll lose AF with the 2x TC @ f/4.0).

I would get the Sigma TCs since they are matched to their lenses. But it's up to you since you might want the extra reach of the 100-300mm. My preference is to have more control of DOF over reach and the benefit of the extra f-stop, which can come handy under the shade! 8)
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Old Jan 6, 2004, 11:59 AM   #3
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NHL, thanks for the insight. I'm trying to learn as much as I can before making the purchase. I've gotten a couple of lesser lenses, but am holding off to buy the biggie. I've got from now until April to do research. I'd like to have it before Notre Dame holds it Blue-Gold game at the end of April. The AF 2.8 70-200mm EX (HSM) would be better for indoor sports shot with the 2.8, correct?

Lastly, to keep the AF with the 300, I'd need to go with the 1.4xTC right? My concern, as with most people, is reach. Would that be a viable option, or would I still be better going with the 200/2x TC combo? The f2.8 makes a big difference, doesn't it?

Again, thanks.
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Old Jan 6, 2004, 12:53 PM   #4
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I would bet the optical quality would be better with the 300 & 1.4xTC than the 200 & 2xTC. But I don't have the lenses or TC to test.

You are right, you can only use the 1.4TC to keep AF.

Yes, unless the lighting is really, really good, the f2.8 will probably be more important for an indoor game. But if you have a camera now you can test this. Just try to take a picture in the same setting and see what aperture & shutter speed you get. It should be the same with the new lens (just with more zoom.)

BTW, both those lenses are reported to be of quite good quality. So don't worry about them on that front. They should both produce good, sharp pictures (with little distortion or color problems.)

Eric
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Old Jan 6, 2004, 1:57 PM   #5
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TCs do burn speed from a lens (usually a stop or two, depending on the factor).

Just something to consider...
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Old Jan 6, 2004, 2:36 PM   #6
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Remember the camera already has a built in 1.6x factor...

The way I see is this: F/2.8 is nice to achieve the shallow DOF effect, but one should not use any lens wide open unless one has to because of shutter speed! A lens is usually softest wide open... and this is where its flexibility comes in: its ability to close down a couple of f-stops. If you did this on a slower lens and stop it down the same way, it becomes usually too slow for any action shots (unless one boosts the ISO or use flash).
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Old Jan 6, 2004, 3:08 PM   #7
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So..

Sigma AF 2.8 70-200mm EX (HSM) w/ a Sigma 2.0x TC?
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Old Jan 6, 2004, 4:35 PM   #8
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I've got the Sigma 70-200, and this lens is sharp.

Two examples: (2048x1360, you're warned)

http://www.cray.demon.nl/digifoto/vb/IMG_4629.jpg

http://www.cray.demon.nl/digifoto/vb/IMG_4985.jpg

The first photo was shot trough a wire fence, and to blur it out, i used the lens wide open.

I ordered both the sigma 1.4x and the 2.0x extenders, wich will arrive tomorrow. (actually they arrived today, but i wasn't hoe, so ill have to pick them up at the post office tomorrow.) ill shoot some test pics with the extenders, and post them here.
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Old Jan 6, 2004, 5:21 PM   #9
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Here's my bird using the same ∑ EX 70-200 F2.8 HSM! :lol: :lol: :lol:
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Old Jan 6, 2004, 5:35 PM   #10
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Mark H, I'd like to see the TC images. What prompted you to get both the 1.4 and the 2.0? Was it the f/2.8 hit you take between the 2 TCs? NHL, thanks too. Your info is invaluable to me...
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