Originally posted by dlacouture Well, you can also trick the k10 into thinking an A lens is used, by grounding both the A and Data electrical pins of the mount.
While doing so with the Data pin is quite easy, the A pin is recessed, and thus is a little harder to short.
Anyway, once done, the flash will work properly in P-TTL mode with your manual lenses...
Maybe it will lead to some inconsistent exposure, due to the lack of some information being transmitted to the body (focal length, aperture, and so on...), but I still has to witness this!
Only setback is that you have to manually select the widest aperture available on the k10 (as it now thinks it has an A lens attached), otherwise you'll end-up with overexposed pictures...
this is still not perfect as there is a metering issue with the K10D and manual apature lenses, and this may (I have not personally tested) also cause over and under exposure with the flash.
If you are interested in doing a lot with manual lenses, and want the fullest performance from them, (whether it is flash, accurate metering etc) get an *istD