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Jul 19, 2017 13:51:56   #
boberic (a regular here)
 
Is there a TC which will work with an EFs lens on a 7d
 
Jul 19, 2017 14:34:57   #
Winslowe
 
boberic wrote:
Is there a TC which will work with an EFs lens on a 7d

https://www.usa.canon.com/internet/portal/us/home
Jul 19, 2017 14:40:11   #
mwsilvers (a regular here)
 
boberic wrote:
Is there a TC which will work with an EFs lens on a 7d


Maybe a 3rd party one, but not one made by Canon.
Jul 19, 2017 16:15:55   #
jerryc41 (a regular here)
 
boberic wrote:
Is there a TC which will work with an EFs lens on a 7d


Take a look at Kenko. They're good quality at reasonable prices. Just make sure it will work with your camera and lens.

https://smile.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=kenko+tc+canon
Jul 19, 2017 17:48:42   #
speters (a regular here)
 
boberic wrote:
Is there a TC which will work with an EFs lens on a 7d

Check the specs!
Jul 20, 2017 11:40:34   #
Nikonman44 (a regular here)
 
Sorry I dont claim to know much about Canons. Be sure to check the specs and buy from a group that allows no cost returns in case it does not perform to your expectations

Adorama is or at least has always been good to me.
 
Jul 20, 2017 14:01:08   #
amfoto1 (a regular here)
 
boberic wrote:
Is there a TC which will work with an EFs lens on a 7d


The ONLY teleconverters that can be used with Canon EF-S lenses are Kenko "HD" DGX. 1.4X costs $170 and 2X costs $190.

No other teleconverters made by anyone (including Kenko's own better, but lower priced Pro 300 and MC-4 models) are able to physically mount the EF-S lenses.

The reason why is pretty simple. There are almost no EF-S lenses that make any sense to use with a teleconverter. The only two that might are the EF-S 55-250mm and EF-S 18-200mm. But, with any TC on either of those lenses, your 7D will be unable to autofocus and, specially with a 2X, your viewfinder will be dimmed down making manual focus difficult too. With the 1.4X, I'd be surprised if image quality weren't pretty marginal. It would be compromised even more with a 2X TC.

Frankly, you might be better served saving up a bit more $ to instead buy a longer telephoto lens. For example, on the used market there are some Sigma 120-400mm OS and 150-500mm OS lenses that cost around $500... and will be able to autofocus and give better image quality than using an EF-S lens with a TC. There are some other newer, maybe a little better in some ways and maybe a little longer options... but they all cost quite a bit more. The older 120-400mm and 150-500mm give you the most bang for your buck. I do recommend the image stabilized "OS" version, there's usually not much difference in cost between those and the earlier, non-OS versions of both lenses.
Jul 21, 2017 14:45:27   #
Nikonman44 (a regular here)
 
Thank you for that sage advice.
 
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