Go Back   Steve's Digicams Forums >

LinkBack Thread Tools Search this Thread
Old Oct 18, 2011, 7:57 AM   #1
photonerd's Avatar
Join Date: Sep 2011
Posts: 31
Default Variable ND filter vs. stacked Polarizers

I was wondering if it is better to have a variable ND filter, or stacked polarizers (meaning CP filter on LP filter, to create variable density affect)

I have a CP filter, so for me it would be easier to find a second hand LP filter (shots taken for this will probably be time lapse, so 100% quality is not needed)

photonerd is offline   Reply With Quote
Sponsored Links
Old Oct 18, 2011, 11:24 AM   #2
Senior Member
VTphotog's Avatar
Join Date: Mar 2005
Location: Extreme Northeastern Vermont, USA
Posts: 4,309

When stacking polarizing filters, you can get a purple color cast, as the shorter wavelengths are less affected by the polarizing material. This is pretty easy to deal with in a photo editor, but if you don't want to take the trouble, the variable ND would be the way to go. Haven't used one myself, but guess that they color correct by using a low pass filter behind the polarizers.

VTphotog is offline   Reply With Quote
Old Oct 18, 2011, 2:27 PM   #3
Senior Member
TCav's Avatar
Join Date: Sep 2005
Location: Washington, DC, Metro Area, Maryland
Posts: 13,826

A variable anything or a stacked anything won't be as good as a fixed single filter. Any additional optical element will degrade image quality to some extent, and multiple additional optical elements more so. Whatever you get, get something good. And in the world of filters, price is a good indication of quality.
  • The lens is the thing.
  • 'Full Frame' is the new 'Medium Format'.
  • "One good test is worth a thousand expert opinions." - Tex Johnston, Boeing 707 test pilot.
TCav is offline   Reply With Quote
Old Oct 18, 2011, 3:44 PM   #4
Senior Member
Ozzie_Traveller's Avatar
Join Date: Jan 2011
Location: Australia, New South Wales central coast
Posts: 3,645

G'day PN

This is the sort of thing you get via 2x stacked pola filters ...

subject is water swirling over rocks

Regards, Phil
Has Lumix mirrorless & superzoom cameras and loves their amazing capabilities
Spends 8-9 months each year travelling Australia
Recent images at http://www.flickr.com/photos/ozzie_traveller/sets/
Ozzie_Traveller is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 9:33 PM.