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Nov 7, 2013 at 15:26 comment added Michael C Historically the Sigmas and Tamrons were a little lower in quality than Canon's own consumer grade offerings, but since the digital age got rolling in the mid-2000s they've equaled and sometimes bested Canon's consumer grade lenses both in terms of price and performance. In the last couple of years they've both begun to offer lenses in the same class as some of Canon's L glass, but at pricing also similar to the L series.
Nov 7, 2013 at 15:18 comment added Rudiculous Ah, what a useful website! Well that clears things up, glad I didnt take the gamble. I have no particular affiliation with Sigma, they just seem to be more affordable than Canons own lenses and Tamron don't appear to have such a large range for EF mounts. This will make things easier, thanks again. Oh, good insight! Had considered those but thought such a large focal length difference would have some drawbacks. Will look into quality 70-300 whilst saving up for something more L quality.
Nov 7, 2013 at 15:17 comment added Michael C I've had a little experience shooting with Sigma 50-500mmm and 150-500mm lenses that different friends have bought and subsequently sold fairly quickly. Beyond about 250mm they get so soft as to not be worth the trouble. You are better off shooting at 300mm on a decent quality 70-300mm zoom and cropping. Avoid the Canon 75-300. It is junk. The 70-300mm f/4-5.6 aren't bad for what they are.
Nov 7, 2013 at 15:11 comment added Michael C That looks like the model 171 that will also have compatibility problems with a post-2001 Canon body. Using the link below, hover over 'Dedicated Lenses' and click Sigma in the drop down, then scroll down to the Sigma AF 400mm f/5.6 APO [171]. canon-eos.bplaced.net
Nov 7, 2013 at 15:05 comment added Rudiculous Yes, true! However I have only heard very mixed results about the mirror lenses, the other alternatives I had in mind were things like 120-400mm Sigma lenses or a 70-200mm variant with a teleconverter but again they're at least a couple of hundred pounds over the 400mm f/5.6. I will take what you said into consideration, thanks for all your help! I have found a more modern variation of the 400mm f/5.6 going on eBay - ebay.com/itm/… so maybe this will do the trick!
Nov 7, 2013 at 15:04 history edited Michael C CC BY-SA 3.0
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Nov 7, 2013 at 14:59 comment added Michael C On the other hand, 70-300mm f/4-5.6 zooms are cheap and plentiful.
Nov 7, 2013 at 14:57 comment added Michael C There's nothing that comes close to 400mm f/5.6 for less than 5-10x the price of the old Sigma unless you are willing to try a fixed aperture manual focus mirror lens like the amazon.com/Rokinon-Multi-Coated-Teleconverter-Digital-Cameras/…
Nov 7, 2013 at 14:40 history edited Michael C CC BY-SA 3.0
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Nov 7, 2013 at 14:33 comment added Rudiculous Thank you, thats really helpful. Messaged the seller but unfortunately he wont accept returns outside of the US (I reside in the UK) so no chance to check compatibility and then return. Seeing as the 1DMK2 is 2004-05 I suppose it would be a risk. I have read about the rechipping, but after contacting the seller he isnt aware if wether it has been chipped or not and Sigma no longer provide said service. Would you therefore recommend a more recent third party lens or something like an older Canon EF lens? Thanks!
Nov 7, 2013 at 14:22 history edited Michael C CC BY-SA 3.0
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Nov 7, 2013 at 14:11 history answered Michael C CC BY-SA 3.0