Originally posted by stevebrot I assume you mean the somewhat arbitrary convention of "normal" being equal to the diagonal of the image frame?
Yes, and I agree it's an arbitrary definition. AFAIAC any such definition will be arbitrary, since our eyes' FOV varies from sharp in a very small circle to just perceptible at a very wide angle, nothing like a photograph. However, it does seem to be the accepted convention. That Pentax has been one of the few manufacturers to produce lenses in the 40-43 range is one of those things we like about the company.
At any rate it all comes down to taste and I won't try to argue out of your preference for a slightly longer FL! I've only just started shooting with my 28s and 35 so I can't say I've developed a preference yet. No 30 or 31 yet (get thee behind me, LBA!).
Thanks for posting the nice set. Funny, yours do look like a wider perspective than the others posted so far. I guess because most of them share a rapidly receding subject.