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11-11-2011, 01:50 PM   #1
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Sigma EF-500 DG super for K-r

Does anyone know if the SIgma EF-500 DG super will work with the K-r, and if so are they fully compatible or would some functions not work since its an older flash gun model?

Any insights?

11-11-2011, 01:59 PM   #2
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Sigma - Pentax P-TTL Flash Comparison

There are older-still EF-500 DG models as well, and again, the power is the only significant difference. These older flashes flashes may need to be sent to Sigma for a free firmware upgrade for complete compatibility with current Pentax camera bodies. Without it, the EF-500 DG Super won't work in wireless mode with the K10D and newer. It's possible that the current Sigma flashes may need similar updates for future Pentax models, but they operate just fine out-of-the-box with the K-r and K-5
11-16-2011, 09:08 AM   #3
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be sent to Sigma for a free firmware
If I buy a used EF-500 DG Super I guess it wont be eligable for a free firmware upgrade. It usually only applies to the original owner. Will it work without that type of upgrade?

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