Extenders / Apperture Effects

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108
Edit My Images
Yes
Hi,

I wonder if someone would clarify this for me please?

If you have a f2.8 70-200 lens with a 2x entender, the apperture at 400mm would go down to 5.6 ?
At 140 would it still be 5.6 ?

Thanks
 
Roy
Thanks, I've ended up running two threads by editing the 1st incorrectly
 
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