501 vs 503?

[blando3]

I own the 3221 Wilderness Systems tripod with 501 head and can't stand the fact that it doesn't have a ball head for leveling. So, I'm looking at the 351MVB2 with either the 501 or 503 head. Any suggestions on why I should pay $100 more for the 503 head? I really don't know the difference between these two, so if anyone can give me a few pointers, that would be great.
Thanks!

[HorseFilms]

What's nice about the 503 is the counter balance spring. It keeps your camera from wanting to nose dive when you take your hand off the pan handle.

[dvxdu]

yes, our friend with the two legged horse makes a good point. If you have any attachments to your camera like: a matte box, camera light or LCD monitor, you want the 503. It prevents attachments from getting knocked around if your head isn't locked down tight. I have the 501 and it is a great head for the DVX (both are) in retrospect though , I with I had gone with the 503.

[dbalman]

I just bought those sticks with the 501 head last week and I find it very adequate. Then again, I only have an external mic attached and do not plan to add any other attachments.

[weismangroup]

I had the same question when buying my setup 2 years ago. No question - go for the 503. In addition to the the counterbalance - which makes a big difference - the 503 is a true fluid head in that there are 2 plates separated by a viscous liquid, which is contained in sealed unit. The 501 is only fluid-like in that it has 2 friction plates, but with a bit of lubrication between them. Many users report that the 501 sticks a little, especially at the beginning of the move.

[DavidChia]

the spec of the new 501hdv is quite similar to the 503. maybe that might be an option for you. It has the counter balance spring too.