boberic
Loc: Quiet Corner, Connecticut. Ex long Islander
Is there a TC which will work with an EFs lens on a 7d
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.
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.
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.
Thank you for that sage advice.
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