aperture of FF lens on Crop sensor

Started Feb 24, 2013 | Discussions thread
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jck111
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aperture of FF lens on Crop sensor
Feb 24, 2013

If i put a FF lens on a DX sensor cam, i'm using less of the exit pupil of the FF lens (since the sensor DX sensor is smaller than the FX sensor), right?  How does this affect the "effective" aperture of the FF lens on the DX sensor cam?  Seems to me that the FF aperture should appear "more open" to the DX sensor, is that right?  Again, thanks!

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