Graduated Neutral Density Filter - Ring or Rectangle

[agatep]

I am interested in a a GND filter. I have seen a few that you can directly mount onto the lens (ring mount) without an adapter. You can also purchase the kind that fit onto an adapter (Sing Ray, Cokin).

I would like to purchase the ring-type filter.

Any recommendations?

[Denny G]

You can not adjust the ring filter up or down to accomodate or adjust to a skyline.

[sandpiper]

Get a square one !

With a circular filter you can only ever have the dividing line in the same place (generally the middle I suppose). If you want more or less covered by the ND area, you're stuffed.

Square ones are much more adjustable and you can place the ND where you want it.

[Jon]

Rectangular, as stated above. You want to adjust the grad to the picture, not vice versa.