EF 100-400mm f/4.5-5.6L IS USM or equivalent off brand

Started May 18, 2012 | Discussions thread
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SmallTownUSA
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EF 100-400mm f/4.5-5.6L IS USM or equivalent off brand
May 18, 2012

Hi All:

Still investigating a long lens. Does the EF 100-400mm f/4.5-5.6L IS USM accept a 1.4 extender? Are there non-Canon equivalent which will except a tele extender (and give good IQ)?
Thankx, Harold
P.S. I shoot with a 60D

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