Originally posted by Discipulus Any advice for manual focus? Especially in situations where your taking candids and snapshots?
Practice, a lot of practice. Unless you are able to review and try again, always stop down enough to give yourself room for error. For fast moving subjects catch in focus can help a lot, again leave room for error with DOF. Another technique for fast subjects is burst mode, focus as the shutter is firing and you'll be more likely to get a usable shot, it is essentially focus bracketing.
The focus confirmation hexagon is reasonably reliable unless you're dealing with very thin DOF.
I see you have a K-50, so you have focus peaking in live view, that can be a huge help.
Originally posted by Discipulus What's a push pull?
Also called a one-touch zoom. Same ring focuses and zooms, push/pull to zoom, rotate to focus.
To answer your main question, most of my stuff is from thrift stores and flea markets. A few have come from here on the forum either by trade or bought.