| Author | Thread | 
		
			|  | 09/21/2007 04:13:44 PM · #1 | 
		| | Is the extra money worth the 2.8? | 
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			|  | 09/21/2007 04:18:42 PM · #2 | 
		| | Depends really.  I recently got the 2.8 without IS.  It is an awesome lens.  I had a Canon 70-300 IS lens and found that I had very little use for the IS and the lens didnt last long because they are plastic. You can't use the IS when mounted on a tripod or when panning, so felt there was no point as I shoot mainly horses. 
 I picked my 2.8 up at KEH.com for $999 second hand.
 
 
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			|  | 09/21/2007 04:23:25 PM · #3 | 
		| | I'm given to believe that the IS on the 70-200 lenses does not need to be switched off when the camera is mounted on a tripod, although it hardly adds anything to the picture quality in that instance, it has to be said and I further believe that the IS system will aid with panning in mode 2 setting. 
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			|  | 09/21/2007 04:27:18 PM · #4 | 
		| | KEH f2.8 and f4 
 I have used these guys many many times and have never had a problem with them.  Bought my 20D, my Metz ct60-4, other lenses and batteries etc,. You will see their prices are great.
 
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