Originally posted by johnc ...
One thing I have noticed today is that the problem is absolutely very much worse with some lenses than others. With my DA*16-50 the results are the worst (especially at the wide end with open aperture), DA*50-135 can also be provoked if pushed hard. I simply can't provoke a problem with my FA 100 Macro, and I have to work hard (e.g. unusual scenes with smaller areas of white pointing directly at the area where the bounce hits) to get a bad result from my A50 f1.2, even at f1.2. I could see with the f1.2 that the bounce is firing with a far lower power than ever will be reached with my 16-50, even at the same 50mm/f2.8. ..
See my previous post.
I think that lens with a long focus ring stroke give more accurate distance estimation (eg. my 55-300 works fine, Tamron overexposes).
"A" lens do not communicate distance. So A lens should work as in case of bounced flash.
This is my idea. May be Pentax introduced a correction depending on distance starting from k-5...