Originally posted by stevebrot I don't believe there have been any general issues with the post K10D cameras with Pentax-brand P-TTL flashes or even the K-01, K-5, and K-3 with same. I did a little Google work and was reminded at how selective memory is. Indeed there have been reports of P-TTL overexposure issues with the K-5 and K-7 though none for the K-3 that I could find.* This thread from earlier this year contains several other links to related threads... Overexposed P-TTL when using Metz flash
Here is another thread that I found , back from 2011 :
https://www.pentaxforums.com/forums/115-pentax-k-5/129538-pentax-af160fc-auto...ing-flash.html
- post from '
xGene' - it looks like he had very similar problem - overexposing when getting in macro distances.
Originally posted by stevebrot Since both the camera and flash are still under warranty, this is an excellent opportunity to see what Ricoh/Pentax suggests and whether they are aware of any known general faults causing this problem with these cameras.
I definitely agree that Ricoh should do something about this, and I blame myself for not reporting this problem earlier ,when I got my K-01 - but somehow I dismissed the problem due to other important matters. Now when I come to think of it - it actually is quite serious issue that prevents me from fully using my flash with fairly new body (K-01) - and if these issues are still existing on K-3 - then this is a major concern and a good reason to alert the Ricoh.
Originally posted by stevebrot Or a failure of the flash to respond to the camera's commands. Since both the camera and flash are still under warranty, this is an excellent opportunity to see what Ricoh/Pentax suggests and whether they are aware of any known general faults causing this problem with these cameras.
I think this problem should be solvable via firmware only. The flash is working 100% with K10D - that means the flash has full capacity to perform via P-TTL protocols and is maintaning good communication with the body. Getting it on K-01 proves that problem lies on the body side - at least in my case - but hearing other reports ( mind you! The flash IS expensive and fairly few people are actually having and using it ! ) - and if I was responsible for that at Pentax - I would start looking in their firmwares what's been changed in P-TTL code in those newer cameras, when compared to a K10D.
Originally posted by Digitalis The reason the camera is overexposing is that the metering isn't taking the flash into account, you are using AV mode ( which IMO is a fault in technique, Using AV mode for flash is like using Auto ISO in manual mode.) The overexposure is due to the camera trying to expose for the level of ambient light - and the flash is pushing light levels beyond that- because you are too close to the subject or the subject has reflective parts that is confusing the PTTL metering, Use the flash and camera in full manual mode at 1/180th and you should be fine. You will need a higher shutter speed anyway because of the longer focal length.
I have a habit of using my flash units in manual mode anyway, and the AF160FC is no exception. I can happily say I have never had this sort of issue with my ringflash.
I will have to disagree with you since I specifically used Manual mode for my test shots ( check exif )- besides this is not true. When you enter the AV mode with P-TTL flash on, the camera will automatically set your shutter speed - usually it stays at above or on 1/60th - but is limited to 1/180th . I often shot with K10D and AV mode - and there is no issues with my flash - it is delivering perfectly exposed shots. The K-01 on the other hand is simply ALWAYS overexposing - doesn't matter if I use AV or M mode.
So your reasoning is partially correct - I CAN use the flash in Manual mode - which I do, but the point is that it SUPPOSED to work also in AUTO mode. So perhaps you could put your happiness to test
and do a shot with your flash in AUTO mode ? Go down to 1:2 or 1:1 with it in AUTO and in either M or AV mode ( with ISO set to 100 ) and let's see if your camera are any different from those reported so far ? That would be very helpful !