yes, its true, XR-older series does not have AE-Lock. They are more or less in the same generation as the Pentax K bodies. But, it might worth a look the newer XR7. Is has good features (AE-Lock implemented much better than in the Chinon - you just press AE-L button and you can leave it there. The camera memorises the exposure value until the shot is taken or until you press it again ;-) , also it has manually sectable shutter times till 16 seconds, if interested needed, smaler body, like the Chinon/Pentax-M, dof preview). What i didn't like on the XR7 is the elecronic needle in the viewfinder (does not use leds like pentax /chinon uses :-( ).