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10-30-2011, 11:41 AM   #1
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TTL flash for 645.

I'd like to get a flash for the 645. Does it use the same TTL as the new digital SLRs. Can I get one flash for the 645 and a K-r if I get one?

10-30-2011, 02:22 PM   #2
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The 645 uses TTL flash. The new DSLRs use P-TTL flash.

The current Pentax flashes like AF360FGZ and AF540FGZ support both modes and can be used on the 645 as well as on a Pentax DSLR.

Older Pentax flashes do not have P-TTL.
10-30-2011, 03:06 PM   #3
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What you need is a TTL flash for the Pentax 645 and 645N cameras. If you have a 645NII you get to use P-TTL.

The K-r only supports P-TTL.

As Ole noted both the AF360FGZ and AF540FGZ support P-TTL and TTL so you could use them on both cameras.


Chris Stone
10-31-2011, 02:49 PM   #4
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The Metz 48 AF-1 (and presumably others of the same generation) supports the old TTL as well.


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