When an answer is obviously out of date or incomplete, but I can't help it myself, how do I call for updates?
It is not unusual, after all the most likely reader of an outdated answer is someone who is searching for info on something, and perhaps knows enough to recognize out of date or incomplete info, but not knowing enough to edit it him/herself. When downvoting such answer is not going to help at all.
A comment will of course be noticed by the original poster, who may or may not react, or who may have lost interest and left the site for good.
If I edit the answer just a bit, it would bump it up onto front page of Active questions and perhaps draw some attention that way? Is that good thing to do? Personally I would not encourage this method.
I could offer a bounty on the question and be reasonably sure that at least some people will notice it and hopefully make edits or new better answers. But what if it is a community wiki? Can we offer a bounty to community? :)
Then I could talk about the need for updates in chat, but there's only so many active users there and it'd depend on luck if someone able to help happens to see it.
So, how to call for updates?
Which digital cameras are using which sensors? - is the reason I ask.