Originally posted by stevebrot I will have to give that a try one of these days. Are you saying that there is some sort of special sharing of SR information (other than the lens id) when when an auto-focus lens is mounted?
Steve
I know with my two Sigmas, my kit lens, and my old 28-90 the lens tell the camera "I'm at XXmm". A zoom thats only an 'A' (or lower) can't tell the camera where it its zoomed to, so the camera will just use whatever SR setting it was at last.
I'm not sure when the lenses started communicating focal length to the cameras - my FA28-90 and my rickety old Sigma 70-300 both communicate it, and they're film-era lenses.
Out of curiosity, what was the first camera to feature shake reduction from Pentax?
EDIT: Here's the EXIF data from my 28-90, for example...
EDIT II: This is also why I suggest if someone is new to digital photography and is looking to go buy a prime or primes to buy a cheap AF zoom with a good range in FLs first and use it for a while - you can look at a list like this and see where you gravitate to most often. In my case a 35mm, 55mm and 70mm would be worth checking into based on these results.