I haven’t played guitar much in ages, and when I had mine repaired recently, I found that my old rubber band style capo was useless-- the rubber straps and bar had totally deteriorated.
I see that there are a million options out there now. Any recommendations? This is a 6-string Guild F-30, if that matters.
There is some nice quick release ones around that are quite cheap. All you need is something that presses on the strings and doesn’t mark up the neck.
Welcome back to the world of strings 
John
Capos are like picks - you may have a zillion of them, and end up using the same one all the time. In my case it’s a standard Shubb 6-string curved capo ([u]link[/u]), that I’ve used for 25 years now. I’ve replaced the rubber twice and re-glued the bumper pad once, and it’s still going strong. It’s light and compact and fits easily in your pocket. The soft rubber and adjustable tension give fewer intonation problems than many other capos I’ve used. The only real downside is that capo changes are usually a two-handed affair.
I also use the standard Kyser 6-string spring-clamp capo ([u]link[/u]). It gives you slightly faster one-handed capo changes at the cost of slightly worse intonation (fixed tension, harder rubber), but it works OK. There are also some cool partial capo tricks you can do with it, especially for double capo configurations. But I also think the scroll thing is butt-ugly. Looks like it was designed by Klingons.
Recently I’ve been using the newer Quick Draw sliding capo ([u]link[/u]), especially for session playing, and I’ve seen quite a few trad guitarists using it. Installation and setup are a bit tricky, and it’s meant to be left on the guitar. But once set up it works like a charm*. Slide it instantly to where you want it, or push it out of the way behind the nut. Great for super quick capo changes in the middle of a set. With practice, you can even keep playing through the key change. And the intonation is surprisingly good.
(* Unlike the Glider sliding capo. A similar idea, but it simply doesn’t work.)
I haven’t tried any of the clamp/ratchet capos, but I suppose they work fine, too. Of course, there’s still nothing wrong with the old elastic strap or nylon band capo for occasional use. And there’s always a rubber band and a pencil when you screw up and leave your capo at home …
For your F-50 with a curved fingerboard radius, just look for a curved capo for the best intonation. The Shubb and Kyser are commonly available at local shops. And Elderly carries all three, including the Quick Draw.
I second the Shubb. Best capo around.
Recently I was digging through my collection of guitar magazines and found one with a feature on capos, they reviewed about a dozen of them and came out in favour of the shubb as well.
I could never figure out how a Shubb worked, so I’ve only used a Kyser and a bizarre wire and cork capo that scratched my guitar. I’ve seen Kysers fly across a room when in the hands of clumsy people.
Count another vote for the Shubb.
I use a Kyser, which suits my purposes. Its primary use is to accompany singers, since their comfortable keys can often have more flats than I want to deal with. Never use it for accompanying tunes.
I use a shubb and a new planet waves capo which is very nice and light. but neither has 1 handed quick change.
Just ordered a Shubb from music123. I don’t care about one handed changes or speed, just good function. Thanks all.
Not much to figure out, mute. It works sort of like Vice Grips. You tighten (or loosen) the screw until the capo is barely snug. Then give the screw one more twist and snap it on.
I’ve seen Kysers fly across a room when in the hands of clumsy people.
Very true. Or if your hands are sweaty. Losing control of a Kyser when you’ve got it squeezed fully open is not a pretty thing.
If I would have seen someone use a Shubb and let me watch them, I could have figured it out but the person I knew who had one, inherited it with her guitar, had no clue how to use it either and we both agreed that we liked the mettalic colors of the Kysers. Never discount sparkly.
Especially if it goes with your guitar …
Ha! Got it.
Got my Shubb (basic brass) and I think it’s terrific.. Lots less bulky than many of the metal capos I’ve seen.
Shubb capo if you want it to come off of the fretboard:
http://elderly.com/accessories/items/GA70DLX.htm
Paige capo if you want it to stay on the fretboard:
http://elderly.com/accessories/items/GA82-BLK.htm
I prefer the Shubb for tone, but I always have a Paige on my guitar, just below the nut so I don’t have to go searching for the damn thing.