Difference between the FX and the DX format?

Started Mar 1, 2013 | Discussions thread
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retired Dog
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Difference between the FX and the DX format?
Mar 1, 2013

I was wondering what the difference is between the two formats. And does it matter

which lens to use for each? Thank you.

 retired Dog's gear list:retired Dog's gear list
Canon EOS 7D Pentax K-3 Canon EF 400mm f/5.6L USM Pentax smc DA* 300mm F4.0 ED (IF) SDM Sigma 18-50mm F2.8-4.5 DC OS HSM
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