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Old Feb 21, 2007, 4:10 PM   #1
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I have some most likely basic questions about lens acronyms.

in 70-300 DL macro what does the dl stand for? can I take action photos with this lens?

what does ex, s, dx, APO, dg, and others mean? I'm confused!!! Help :?

If I'm looking for a 300mm lens to take action soccer shot should I look for a certain acronym or are all 300mm with comparable F/#'s created eqaul?
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Old Feb 21, 2007, 6:59 PM   #2
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Well, I don't know what DL stands for in the Sigma line,

style="BACKGROUND-COLOR: #000000"but the APO version of the Sigma 70-300 is the better of the 2 lenses.

style="BACKGROUND-COLOR: #000000"APO stands for apochromatic. It's a lens design that increases sharpness and contrast.

style="BACKGROUND-COLOR: #000000"EX is the sigm professional lens line - similar to Canon's L line

style="BACKGROUND-COLOR: #000000"DG in the sigma vernacular means the lens has been treated with an extra digital coating to reduce flare (which results from light bouncing off digital sensor). Not to be confused with the DC code in sigma speak which refers to lenses designed with smaller elements and made for aps-c sized sensors only (i.e. they won't work on full size or 1.3 crop sensors - you'll see vignetting on the edges).

style="BACKGROUND-COLOR: #000000"Need more context to give you a definition for 's' or 'dx'

style="BACKGROUND-COLOR: #000000"In answer to your second question - all 300mm lenses with the same f-number are NOT the same. The Sigma non-APO I wouldn't even bother with.

style="BACKGROUND-COLOR: #000000"The Sigma 70-300 APO is a decently sharp lens to 200mm and OK from 200-300. But it does not have HSM (another acronym which stands for Hyper Sonic Motor - sigma's fast focusing motor and the equivelent to Canon's HSM).

style="BACKGROUND-COLOR: #000000"The Canon 70-300 lens is sharper and faster to focus and it has IS (image stabalization) but it's also around $550

style="BACKGROUND-COLOR: #000000"You should know that with an aperture value of 5.6 these lenses will limit you to daylight games only. So if any of the soccer matches are played at dusk or under lights these lenses won't yield very good results.

style="BACKGROUND-COLOR: #000000"Here are the 300mm lenses in the order of quality:

style="BACKGROUND-COLOR: #000000"Canon 300mm 2.8 ($4000)

style="BACKGROUND-COLOR: #000000"Sigma 120-300 2.8 ($2200)

style="BACKGROUND-COLOR: #000000"Sigma 100-300 4.0 ($1000)

style="BACKGROUND-COLOR: #000000"Canon 300mm 4.0 (????)

style="BACKGROUND-COLOR: #000000"Sigma 300mm 2.8

style="BACKGROUND-COLOR: #000000"Canon 70-300 IS USM ($550 - do NOT confuse this with the Canon 75-300)

style="BACKGROUND-COLOR: #000000"Sigma 70-300 ($180)

style="BACKGROUND-COLOR: #000000"As you can see there is a big price point difference among these lenses. The sigma is a great bargain and a nice starter lens. If you can swing it, the following lenses are all worth the price increase:

style="BACKGROUND-COLOR: #000000"120-300 (what I use for soccer - 90% of what the canon 2.8 prime gives at half the cost AND it's a zoom)

style="BACKGROUND-COLOR: #000000"Sigma 100-300 f4 (fantastic sharp lens)

style="BACKGROUND-COLOR: #000000"Canon 70-300 (sharper and faster to focus than the sigma and worth the upgrade)

style="BACKGROUND-COLOR: #000000"Finally you should realize that for night games under lights and even at dusk time only a 2.8 lens will be good enough. If you can't afford the 120-300 another option many people take is to get a 70-200 2.8 (canon's is $1100, sigma's is $800) and pair it with a 1.4x TC. That gives 280mm for day games and you can take the TC off and have the necessary 2.8 aperture for low light. Not much reach but at least you can still get SOME shots.
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