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| Lenses Discussion of Lenses | 
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			#1  
			
			
			
			
			
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|  Options to Canon 17-85mm 
			
			I enjoy the 17-85 on my 40D.  However as I now have a 1D Mk111 the 17-85 is not compatible (I am correct aren't I??)-haven't tied it as I read it would damage the mirror. I would be interested in alternative recommendations. Criteria being........... Similar focal length (as a general purpose/walkabout lens) IS or alternative (as I think it's a valuable tool) Same or bigger aperture. I can't say money is not important-(one for £50.00 would be nice  ) but it's not the main criteria as I don't want to be for ever sorry I didn't spend 'just that bit more' Thanks | 
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			#2  
			
			
			
			
			
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			You are right that your 17-85 isn't compatible with a mkIII and also that you could damage the mirror by trying it. The lens can be modified to work on your camera, but I wouldn't recommend it, you'd get strong vingetting at the wide end. The obvious lens to suggest isn't a cheap one... I'd look for a Canon 24-105 f4 IS. A friend uses one on a mkIII for protrait work and gets outstanding results.
		 
				__________________ https://www.flickr.com/photos/37669825@N04/ | 
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			#3  
			
			
			
			
			
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  ) there were some interesting pro's & con's for this lens. I read on some that vignetting is a problem at the wide end (one from a pro of 25 years with photo evidence). I was hoping to find an equivalent Sigma/Tamron with rave reviews at 1/2 the price but nothing so far! | 
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			#4  
			
			
			
			
			
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			You've obviously looked at this one: http://www.sigma-imaging-uk.com/lens...4-70mm_hsm.htm (Sigma 24-70 2.8 HSM) | 
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			#5  
			
			
			
			
			
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 Harry | 
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			#6  
			
			
			
			
			
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			I use the older sigma 24-70mm pre HSM one, and though a little soft (relatively speaking) at the 24mm end, it is a fantasic lens for the money. Ironically, I do prefer the handling of the very similar 28-70mm f/2.8 sigma, though obviuosly you loose the wider capabilities. Of on a tangent, may I thoroughly recommend the Sigma 20mm f/1.8. I've been using one for a while now. Again, a little soft wide open at f/1.8, but a simply stunning lens at a bargain price. 
				__________________ primarily using Nikon film and digi kit, and some micro 4/3rds gear for experimenting with old lenses | 
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			#7  
			
			
			
			
			
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 http://www.the-digital-picture.com/R...ns-Review.aspx Unfortunately, I consider the Sigma 20mm f/1.8 EX DG Lens to be unusable at f/1.8 unless you are looking for a soft-focus effect. This lens is one of the softest I've seen wide open. Realistically, this will be an f/2.8 lens to most people as the center does not become decently sharp until this aperture. But wait - there goes the Sigma's uniqueness advantage for now there is a direct Canon counterpart, the Canon EF 20mm f/2.8 USM Lens that costs about the same price. 
				__________________ ___________________________________ Equipment - more than enough thank you | 
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			#8  
			
			
			
			
			
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  Some have said the Sigma is virtually useless at the 24mm/wide open while others have said the Canon 105 vignettes a lot. I can't think of too many occassions when I would shoot at 24mm wide open but it's a shame to pay for that option and not be able to use it. I have got used to having IS on my 17-85mm but is that important on 'comparitively' short lenses ? Has anyone got all 3 lenses they could lend me for just 6 months?   | 
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			#9  
			
			
			
			
			
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   You could however hire the 2 canons for a weekend for less than £100 which might be worthwhile before investing circa £1K? http://www.camerent.co.uk/camera_hir...on_lenses.html http://www.hireacamera.com/cameras/h...nlenscanon.asp 
				__________________ Nigel | 
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