Okay, using screw caps in a class room is annoying. If I don't cap, I fear dropping the pen nib first or the ink dries in the feed... If I cap, I waste seconds everytime to try to get the cap off. Plus, the section banging on the edge of the cap is making me nuts..

So what's a good slip cap pen for note taking? Large ink capacity necessary

How about a Namiki vanishing point? No cap at all.

You're not giving us a lot of parameters, but I'd suggest (because I just got one and fell in love) a Pilot Prera (available from Ujuku pens and Jetpens). If used with a cartridge, the ink capacity is pretty good. Plus, you can probably actually leave it uncapped for a bit of time without having the nib dry, as I have discovered this morning.

Great pen. And inexpensive, too.

Parker 51 or Lamy 2000 seem like obvious suggestions, but I don't own either so don't listen to me...

These have the bonus of covered feeds so they shouldn't dry out so fast (in theory, what do I know) even if you do leave them uncapped.

Pen must not be heavy in the hand (sorry, that means no metal barrels, etc)
Pelikan 600-ish size would be perfect, slightly smaller or bigger is OK. Self filling and large ink capacity would be best. I have a Lamy 2000, but theres something about it that I can't get used to. Just wanted to see my options.

For my $0.02 I would go with a Lamy 2000 if you would like a modern or, if you want a vintage, a Parker '51' or better still a vintage Aurora 88. Hooded nibs and slip caps and, in the case of the Aurora, piston filler with large ink capacity.

Of course ink capacity was never really an issue for me in lectures as I usually dozed off as soon as I had written the date.

An S.T. Dupont Orpheo would be a good choice. They make a great slip cap.

If the Lamy 2000 does not do it for you then there is the P51, Lamy 27, or, for hands down easy to use, the VP, no cap to drop, carts hold a fair bit and very easy to change without making a mess, smooth nib thats gold and will write in the margin, even with a M nib, faily wet without being a hose, and the carbonesque version is very handsome, either in plain black, or a very striking blue...

Parker 51 aero. Despite the amount of metal used in this pen, it's actually surprisingly light. Even with the cap posted. Buy one of those.

Aurora Ipsilon's another good deal.

Although mine has yet to arrive and I cannot yet give an opinion as to its performance or feel, perhaps as someone else has suggested you might consider the Pilot/Namiki vanishing point. No caps to deal with at all. I understand the converter does not hold as much ink as some would like, so use cartridges and carry spares should they be needed. Save the empty cartridges for refilling to save a little money. I would imagine it might be easier to refill a cartridge each evening to ensure you have enough for the next day, rather than to replace it during a note-taking session.

Reading down the thread, the Pelikan 600 (or 200) fits your other needs well - in terms of self-filling and large capacity you aren't going to beat it with a slip-cap pen, as far as I can see. So the question might become, can you manage the cap better? When I'm taking notes and have it out on a desk, I frequently just slide the nib into the cap, without screwing up the thread. This makes removing the pen from the nib quick but stops the pen rolling from the desk and the ink from drying out. Just train yourself to check that the pen is properly capped when you put it in your pocket.

FWIIW I use a Pelikan or Esterbrook fror notetaking nearly every day.

Just my £0.02

Parker 51 Aero as many have suggested or you can have a look at the Lamy CP1-black, Studio etc which have great slip caps and good ink capacity when using refilled carts. The CP1 is my favorite, it's slim, compact and very sturdy and has a great clip.

Look for a Pelikan Go! in the Marketplace or eBay. It's a piston-filler with large ink capacity and it's a clip-cap.

I vote for the Lamy 2000, classic, great pen ,very durable and a great writer.
Oberon

Pelikan Pelikano? I've been looking at them myself...

No one mentioned the Cross Classic Century, Classic Century II, Townsend, ATX, or Apogee. All slip caps. All brass-bodied, solid pens. It's hard to go wrong with a Cross ... or a Lamy 2000, 27, Pura, etc., etc.

Happy choosing!

I think I'm just gonna try a few more pens
I can't do all metal pens, to heavy in the hand for me
I tried to slip the cap over the nib for short periods and don't quite 100% keep track of the status. I've also catapulted the cap off my desk (the desks in the lecture hall at mounted on a pivot and I leaned on one side of the table once and catapulted it

Go with the Namiki Vanishing Point. It doesn't have a cap and if messing with a cap is slowing you down, that's the way to go.

You just click the button at the other end and the nib comes out. It's easy to work, not too heavy, and the VP's nibs are very good I think you should think about getting a pen that does not have a cap and the Namiki VP is the one! Really...

Erick

I think part of your problem here is fear of ink dry-out, rather than the necessity of capping or uncapping the pen. You want a pen that does not dry out too fast that you feel like you have to cap it every time you pause while taking notes. You may want to look at hooded or semi-hooded pens that resist ink dry-out like the Parker 51, Lamy 2000 (which you have already), or a vintage Aurora 88p. I've left my L2K EF without capping it for 20 minutes and it still writes when I put it down on paper. I use Pelikan black ink. Hope this helps.