I just picked up 2 Tiffen conversion lenses to go on
my Canon Powershot G2 with a Lensemate Adapter. The adapter
is 49mm (female) and the conversion lenses are 43mm (male).
I've found a few on-line dealers of step-up/-down rings,
but I'm a bit confused by the terminology. One dealer sells
step-up rings in 43mm to 49mm, and step-down rings in
49mm to 43mm. There is a $3.00 difference in price, so I'm
guessing these aren't the same thing.

Does anyone know which I need, step-up or step-down? And
what's the difference?

I'd hate to wait for the thing to show up, only to have to
send it back and wait again.

Thanks