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Old Jun 22, 2005, 7:55 AM   #11
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PeterP is quite correct

Sigma had a compatibilityissue once - If I recall correctly from my cameras collection this occuredwiththe introduction of the EOS 7 and later bodies. The only people who has problem with re-chipping are folks who have lenses of that era and only on non-'EX' lenses - Just call Sigma to verify and don'ttrust stuffone reads from forums (my post included), especially ifone buy non-'EX' lens used from Ebay

If one sticks with the EX series or any Sigma lenses manufactured after 2000 there are no issue and again call Sigma if in doubt! :-)
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Old Jul 7, 2005, 11:40 PM   #12
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Just curious how you like your new lens and if you could post some pics?

I am still debating my tele-solution and have gotten this far:

It would be nice to have the 70-200 range covered, as my current lens tops out at 75mm. 400mm is about the minimum I can accept for the reach I need.

The Sigma 70-200 f2.8 is a great price and I could get it to 400mm f5.6 with a 2x TC.
The Canon 70-200 f2.8 is... well... white, and I am fortunate enough to have a canon body. The IS version of the same is excellent, but expensive, costing nearly as much as the Sigma 120-300, and canon's TCs are twice as expensive.

The Sigma 120-300 f2.8 is amazing, but reviews say its a little loose, especially with a TC, it lacks OS or HSM, it is the most expensive option, and it weighs a ton.

The Sigma 100-300 f4 is a good deal, and would also put me at 420mm f5.6 with a 1.4x TC, but does not get as wide as the 70-200 and is slightly bigger.

The Sigma 80-400 OS is somewhat heavier, lacks HSM, ans is not an internal zoom as far as I know, but covers the whole range without requiring a TC, includes OS, and still ends up at f5.6.

The Canon 100-400 also covers the range, and offers IS, but is considerably more expensive than the Sigma, and it felt rather unweildy fully extended.
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Old Jul 8, 2005, 12:31 AM   #13
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i can tell you that a true 400mm of this caliber will definately outperform any shorter zoom with a teleconverter.. so if you plan on using it at 400.. then get something that goes to 400 without a tc.. nothing i post on here will demonstrate thisor anylenses capabilities as the file size is limited to 250k.

but if you can live without hsm and you need 400 reach.. don't hesitate on this one.. and if you need 400mm consistantly, buy something that goes to 400.. but if you use 200mm most of the time with only the occasional 400mm, then maybe a nice 70-200 2.8 would serve you better..
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Old Jul 8, 2005, 5:27 AM   #14
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I have never had the opportunity to use a straight forward 400mm capable lens but I can say this, I have taken shots with my 100-300 f/4 Sigma with and without my 1.4x TC and there is no difference in image quality or performance.

Best of luck with 80-400 OS lense and hope to see some pics soon. I would really like to see that OS at work.
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Old Jul 8, 2005, 7:01 AM   #15
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limbiksys wrote:
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The Sigma 120-300 f2.8 is amazing, but reviews say its a little loose, especially with a TC, it lacks OS or HSM, it is the most expensive option, and it weighs a ton.
Is there such a thing as a light and inexpensive fast f/2.8 300mm??? :-) :lol: :G
I can guanrantee you that lens has the HSM and it is fast in AF!
http://www.stevesforums.com/forums/v...333864#p333864

BTW The looseness have nothing to do with the lens! Take any lens and wiggle it when mounted to the body: the locking pin on the lens is smaller than the engaging hole in the body hence you'll detect some play on any of them (Canon included). Add a teleconverter (any of them) and now you have two locking pins on the lens and on the TC which are also smaller than the engaging holes on the camera and on the TC itself -> You've just doubled the amount of play...

The 120-300 f/2.8 EX is mounted on the camera just as positively as any other - This lens sheer size just makes it all the more more detectable that's all, but it's always there regardless of which lens/TC you pick! IMO you're splitting hair here - The truth is theses are all good options and any of the above pick will work for you just fine with the 70-200 f/2.8 + 2x the least desirable option, but also the cheapest :roll:

The proof is all three of us have chosen a different option and we are all equally satisfied... (Canon 100-400 owner's too)
and I have the 70-200 f/2.8 EX + 2x already! http://www.stevesforums.com/forums/v...mp;forum_id=65
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Old Jul 8, 2005, 12:56 PM   #16
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My fault, the 120-300 does have HSM. I think its a great lens, just out of my budget at the moment I suppose, along with the Canon 70-200 IS.

The hair I am trying to split here really comes down to versitility. I want a lens that I can have in my bag all the time, and be able to use it indoors or in low light if I need to.
Those are the main reasons I would lean towards the 70-200 (BTW nice shot with the 2x TC NHL). I'd switch over to a backpack and buy the 120-300 if I could afford it, but right now its between the 100-300 f4 and the 70-200 f2.8.
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Old Jul 8, 2005, 1:15 PM   #17
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well i can tell you my 80-400 OS is an outdoor lens.. i plan on gettinsigma's 70-200 2.8 for indoor stuff before the start of winter..


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Old Jul 8, 2005, 1:50 PM   #18
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limbiksys wrote:
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... but right now its between the 100-300 f4 and the 70-200 f2.8
This should make real easy - Do you shoot mostly indoor or outdoor?

The 100-300 is mostly too long for indoor while the 70-200 is too short for outdoor... :-)
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Old Jul 8, 2005, 3:33 PM   #19
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Haha! BOTH!:? Not any easier I guess, however I CAN extend the 70-200 but I can't make the 100-300 any wider, so I gues it does narrow it down a bit knownig the 100-300 might not perform so well indoors.

Now if someone could explain the differences in the MTF charts between the Canon 70-200 and the Sigma I'd appreciate it. I'm finally starting to understand these things, but when I look at Canon's I can't make heads or tails of it. Also, from looking at the MTFs, is the Canon 70-200 IS optically better than the Canon 70-200 non-is? It looks close, and I was not sure why it should be any different.
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Old Jul 8, 2005, 4:03 PM   #20
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FYI - http://www.photozone.de/3Technology/mtf.htm

The black curves pair on the Canon correspond to the red (contrast) and green (sharpness) curves on the Sigma @ the largest aperture

The Canon's blue curves pair are when the same lens is closed to f/8 which are not plotted on The sigma... Generally the curves get better when a lens is closed down so why clutter up the charts?
Sigma only need to show the worst-case: i.e. the wide open curves -> They only get better from there...

http://www.stevesforums.com/forums/v...mp;forum_id=65
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