Originally posted by gifthorse Unfortunately my eyesight isn't as good as thirty or twenty years ago, so using the autofocus feature helps tremendously. Have an old manual SMC Pentax-M 50mm f/1.7 lens but I rarely use it... Without enough light, it's more of a guesswork than seeing and being sure I got it right. One of the reasons I ended up buying the DA 50mm f/1.8...
Did make a couple of shots with that lens (during last recital) as well and they are in the "good ones" group, however, most of these are unfortunately covering just a part of the scene. If I was just seated a few rows further back they'd be fine, but I usually get to sit at approximately two-three meters from the front edge of the stage, moving backwards results with getting a whole charade of mobile screens in the shot (parents and gran-pa-moms using mobiles for making videos) so I rather sit in front of those if possible.
I read all the replies and am really thankful for all the suggestions, ideas and have to think about it for a while and see what do I gain or lose with each suggested solution. I wasn't going to buy a new (or used) lens now anyway as I have to save up first. Some of the suggested lens do cost like three times more than my budget (or at least what I think I can save up without ending up between a rock and a hard place) so I will really have to think about it. What frustrates me is that the same Sigma/Tamron lenses for Nikon/Canon can be bought for half or 2/3rd of the price of the same lens for my Pentax...
But I wouldn't change it (my Pentax) for the aforementioned two. I like when people who are otherwise not using any "serious" photo gear and find out I'm using Pentax, make a significant and serious expression on their face, followed by a funny nod with their heads and silently say "Pentax, huh? wow..." ... kind of makes me feel important in ther eyes, at least for that moment