nd filters

dont have one and thinking about getting one,,or two:p

which ones do you suggest and when/how should i plan on using them

thanks in advance

What and when are you going to shoot? I suggest a P size considering your lens collection. I like a soft grad ND filter of 2 stops for general use, but a hard grad ND with 3 stops is advised when you have a solid horizontal horizon. These are great at sunrise, sunset or for out west. In general, meter low and high and see how many f-stop difference exists. and apply filter - remember you can stack them.

For non-grad ND, you basically are simulating lower light so you can have longer shutter speeds. this is particularly helpful in shots like waterfalls.

You didn't ask price, and I have no advice = expensive ones get great review but are expensive. Cheaper ones are considered by some to be gray, not. ND.

INFO - LEE Filters GND and ND

slowdad wrote in post #5904318
dont have one and thinking about getting one,,or two:p

which ones do you suggest and when/how should i plan on using them

thanks in advance

Try this link for a better understanding of filters and what they'll do, paying attention to the "big three"...polarizer, ND filter, GND filter. The others really aren't applicable to digital:

http://www.bythom.com/​filters.htm

If you're referring to strictly ND filters (as I'm assuming from your post title) and not GND filters, I'd recommend round ND filters in 77mm size. This size will give you the most coverage with a majority of your lenses (24-70L, 24-105L, 70-200L), and maybe even the Sigma 10-20 (sorry, not familiar with that lens' filter size). I prefer round ND's because they don't allow extraneous light to sneak in between the filters if you have the need to stack, such as what would happen with the square ND's. I'd recommend a 3-stop and 6-stop ND...these will cover you for most situations, they're stackable, and you can combine either or both with a CPL for additional light reduction. If you have a CPL, then you basically already a 1-2 stop variable ND filter (in addition to the polarizing benefits)... Hope all this helps.

Wrap a double thickness of black cloth around them.
The nice thing about oversize rectangular GNDs, is that you can place then farther away from the lens to get a softer edge & the holder is good for "Grease Jobs": Need Help, What Are these?

argyle

thanks for the link. that helps a bunch