Originally posted by Tonytee I must say that I find the responses here very interesting. I trust that everyone will keep in mind that all I am doing is reporting on my findings, with the intent of not only helping myself, but others as well. That is me. Prior to purchasing a new car, I also do a lot of homework on the history of that car, used or new. Is it plagued with a history of frequency of repair? Does it spend more time up on a hoist than it does on the road? Not making an informed, intelligent decision prior to purchasing, to me is a serious mistake. I am not looking for reasons to not purchase a k-50, instead I am relying on the very talented and gifted folks on this Forum to give me reasons why I should not discard my interest in purchasing a k-50. Again, I do hope that I have been helpful to others. Many thanks for all the excellent responses.
This is well and good...and the aperture block issue is certainly a known fault. As you can tell, nobody (except the rather secretive Pentax) has any real clue as to the true frequency of the issue, but it is far from certain to happen. As you can also tell, none of the other issues are known to be any more common with this model as any other...and although quite loyal, Pentax users here are less 'fanboyish' than a lot of brand buyers, so that is likely a fair assessment.
Most K-50 owners have enjoyed good service from an excellent camera that would certainly be a major upgrade from your current body...and for the current prices it is a bargain, even if it does fail in a couple of years...but an extended warranty would put your mind at rest, or spending a bit more on a flagship body would offer greater reliability. You can't ask for better and more honest advice than you have received, so it's really up to you now whether to take the small risk, or choose a different body, or stick with the devil you know.