Originally posted by geekette I know that in manual mode it always fires the pop up flash at full power. But I figured in Av mode (just leaving the lens wide open) it would do p-ttl .. but it appears to fire at full power in that mode as well.. any mode for that matter.
It will work if you fool the camera into thinking the lens is an A type. some people fool the camera by putting a ball of aluminum foil over the depressed contact on the camera's mount - I've never been successful trying that.
I've modified my cameras to think that all lenses are A type by putting a small piece of aluminum foil over the depressed pin and holding it in place with the lens mount ring itself:
Remove the mount ring- put foil over the A pin-replace the mount ring.
This is not a risky mod & is easy to un-do. It makes the camera think that all lenses are type A.
EDIT - this is no panacea. It is best used with m42 lenses or K type lenses wide open. Set the f-stop shown in the viewfinder to wide open - then the camera will not try to stop down the lens; therefore exposures set by the camera are not bad. This method is most useful to me for flash macro photography.
Last edited by newarts; 06-02-2011 at 07:37 AM.