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A converter will decrease your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since most Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx

A converter will decrease your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx

A converter will decrease your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since most Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx

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A converter will increasedecrease your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx

A converter will increase your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx

A converter will decrease your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx

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A converter will increase your lenses lowest aperture, or make it less useful when it gets darker or shady. Plus, you are limited to a 1.4x converter, as the 2.0 converter will likely cause issues with the autofocus on your lens, since Canon cameras require f5.6 or better to focus. The 2x converter adds 2 stops. At 300mm, your lens is already at f5.6, so adding one or two stops will cause it to stop autofocusing. I would avoid the converter route.

Therefore, getting a lens is the best option. Don't forget that you can rent a lens as well, which means you can likely rent a much better lens than you likely wish to purchase.

http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-1.4x-II-Tele-Converter-Review.aspx http://www.the-digital-picture.com/Reviews/Canon-Extender-EF-2x-III-Review.aspx