Originally posted by alexeyga Actually Pentax's implementation of AUTO-ISO is one of the best on the market... for an average Joe that is... When shutter speed is not fixed, it's a function of the current focal length. I don't remember about K7, but in K5 there are 3 different curves for the AUTO-ISO "aggressiveness" that you can define depending on your needs or shakiness of your hands... so at the slowest setting camera goes wondering into theoretical minimum shutter speed limit for that FL way before bumping up the ISO...
Having rather extensive experience with Nikon's auto-iso, my only wish so far is to have a way of defining the minimum shutter speed limit as I do sports and often don't want to go below 1/500th...
I think you want to be in Tv mode for that,
If you like auto ISO then you have not tried flash. Can't comment on K5, have not decided to get one yet, but on all other cameras, it will take ISO to max first, as opposed to using flash power, and only add flash for the shortfall between auto iso limit and exposure limit.
Note also in flash mode, in auto modes, the camera will follow the rule of thumb for shutter speed (if below sync speed) first, before adding flash. so on a 28mm lens it will go down to 1/30 first trying to make exposure up with flash.