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01-14-2019, 03:43 PM   #1
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Pentax 645n pttl & Pentax 67ii ttl

Hi,

Does anyone know if a flash like this: Metz mecablitz 64 AF-1 digital Flash for Pentax Cameras MZ
Would also work on a 67ii with ttl, in addition to the 645n?

As far as I know the 645n is pttl and the 67ii is ttl - I dont really know what that means in practical terms though.

Cheers
Peter

01-14-2019, 06:42 PM   #2
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The 645N is old style TTL (flash is quenched when detectors looking at light reflected from the film being exposed determine illumination sufficiency). Multiple AF500FTZ flashes (among others) can operate in parallel using Pentax P5 cables. This is the same TTL concept that Nikon used back at the beginning of type F cameras.

The 645Z, and 645D, and most other digital cameras have difficulty consistently judging illumination sufficiency by looking a light scattered off of the photodetector array. Hence, in Pentax' case the PTTL scheme was hatched, wherein the flash lamps are flashed once for measurement and a second time for real. (I'm ignoring HSS here.) The AF540FTG flashes, as well as those of several third party contenders can perform PTTL. I believe that in PTTL mode, the FTG flashes can also communicate using Pentax P5 cables. There may be optical communication also, but I don't have any of these flashes so I haven't delved into their mysteries.

I believe all of the 67s are film type (I don't have one) and can be expected to work with original TTL.

I have no knowledge of Metz flashes.
01-15-2019, 02:05 AM   #3
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The Metz flash is a modern P-TTL type, not film era TTL. It's possible that a late model film 645 camera offered P-TTL, as did some of the last 35mm models, but you'd have to check the specs specifically or wait for a medium format user here to confirm.

For the TTL only cameras then we have the older generation AF-540FGZ which has both TTL and P-TTL, or you have to go back further to the 500FTZ or similar as referred to before.
01-15-2019, 09:31 AM   #4
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QuoteOriginally posted by pkr1979 Quote
Would also work on a 67ii with ttl
The Pentax AF500FTZ is the flash of choice for the 67ii. Also note you will need the Pentax 67ii hotshoe grip (with the 5P sync cable) for a TTL flash to work.

Phil.

01-15-2019, 04:52 PM   #5
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QuoteOriginally posted by mcgregni Quote
The Metz flash is a modern P-TTL type, not film era TTL. It's possible that a late model film 645 camera offered P-TTL, as did some of the last 35mm models, but you'd have to check the specs specifically or wait for a medium format user here to confirm.

For the TTL only cameras then we have the older generation AF-540FGZ which has both TTL and P-TTL, or you have to go back further to the 500FTZ or similar as referred to before.
I do have a 645NII manual, and there is no mention of PTTL, or of any Pentax flash that supports PTTL.
01-30-2019, 01:29 PM   #6
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Hi all, and thanks for the responses. Out of the af500ftz and the af540fgz, which would you go for for these two cameras, and why?
01-30-2019, 01:53 PM   #7
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QuoteOriginally posted by pkr1979 Quote
Hi all, and thanks for the responses. Out of the af500ftz and the af540fgz, which would you go for for these two cameras, and why?
Both the 645N and 67ii are TTL flash, so the af500ftz is your best bet as there will be info in the flash manual relating to these two film bodies. The newer af540fgz probably would not have any user info on these two MF cameras. Note the af540fgzII is P-TTL only, the older af540fgz is both TTL & P-TTL.

Phil.

---------- Post added 30-01-19 at 13:12 ----------

*UPDATE*
I did find a copy of the af540fgz flash manual and it does mention usage on older film cameras like the 645 & 67. However for the 67ii I still would recommend the older af500ftz TTL flash. There are in-depth instructions on using this flash on the 67ii, in both the flash and camera manuals.

Phil.

Last edited by gofour3; 01-30-2019 at 02:00 PM.
01-31-2019, 03:11 AM   #8
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Thanks for this - Im going for the af500ftz :-)

01-31-2019, 11:01 AM   #9
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I wonder why nobody mentioned the Metz AF-58II... would be another option for both.
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