Lens Considerations

[MinisterStanley]

I'm looking at the following lenses for my 20D.

Sigma 28-80mm f3.5-5.6 HF AF
Sigma 70-300mm f4.5-6.7 DL AF

I would like to know if anyone has any experience with these lenses and what can you tell me about them

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[tim]

Take a look here (http://www.photographyreview.com/Lenses/PSC_3787crx.aspx). My one comment is F6.7 is very, very slow for 300mm, I returned a sigma lens because it was too slow at F4.5-5.6.

[TomC]

You could also have a look here (http://www.fredmiranda.com/reviews/showgallery.php?cat=29) for some good reviews of Sigma Lenses. Hope this helps.

[ScottE]

You are using a $1,500 dollar camera and putting $100 dollar lenses on it.

I would rather put my money on good lenses and spend less on the camera if I wanted high quality pictures. You would get much better results if you spent $500 less on the camera (300D) and put into one good lens.

I do not have anything against Sigma lenses, I use several myself, but I would stick to their EX line.

Lenses are a much better long term investment than digital camera bodies.

[Olegis]

Sigma 28-80mm f3.5-5.6 HF AF

I HIGHLY recommend to consider the Tamron 28-75 f/2.8 Xr Di (http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=284399&is=REG) lens over that Sigma. At the price of less that $330 it's really the best lens in its class.

[Jesper]

Take a look here (http://www.photographyreview.com/Lenses/PSC_3787crx.aspx). My one comment is F6.7 is very, very slow for 300mm, I returned a sigma lens because it was too slow at F4.5-5.6.Yes, f/6.7 is very slow, and if I remember correctly (don't have that lens myself) it even has to "trick" the camera, because non-1-series Canon cameras cannot auto-focus when the max. aperture is smaller than f/5.6. So the lens tells the camera it's at f/5.6 instead of f/6.7 when you zoom it to 300mm. How it then compensates for the aperture difference, I don't know....

And Scott is right, you have such a wonderful camera (the 20D), you're wasting its capabilities if you're using cheap, low-quality lenses...

[MinisterStanley]

That is what I needed to know. I know so little about lenses that I need to ask when I see lenses such as these. Thank you for your input.

[S230]

I'm looking at the following lenses for my 20D.

Sigma 28-80mm f3.5-5.6 HF AF
Sigma 70-300mm f4.5-6.7 DL AF

I would like to know if anyone has any experience with these lenses and what can you tell me about them

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I just purchased the Sigma 70-300mm DL AF last week.
The following Link is a sample of an image i've taken with that lens (Small Version)
http://photography-on-the.net/forum/showthread.php?t=50304&page=5&pp=20

The Following link is to the FULL size image (1.65MB)
http://ca.geocities.com/belted_kingfisher2003/samples/img3575.jpg