Originally posted by tb1956 Any secret to selecting 5 exposure order (shooting in Av). ?
I don't have a 645Z, but given the general similarity between Pentax lines, I suspect it behaves similarly to my K-3. Making that assumption and checking the menu guide, the short answer is that the pattern 0, -1, -2, +1, +2 is not supported.*
Diving a little deeper, Pentax bracketing is a strange beast and even going with the default order (your choice), its behavior may be both unusual and unexpected at the extremes of supported settings. I have been meaning to do a write-up, but keep putting it off. The basic gist is to remember that bracketing is based on the exposure compensation feature and that the zero point of the bracket may not be the nominal metered setting. Note too that fail-over for an out-of-supported range bracket point will probably result in a repeated exposure without a blinky display as a warning. My general advice is to use the default order and be aware of whether there is headroom to execute the full number of bracket points.
Steve
* The closest option would be 0, -1, +1, -2, +2