Filter stacking question

3 years 2 months ago #543258 by Bill Rosen
I'm looking at the Cokin P- Series sold ND filters that go from 1, 2 to 3 stops.  If I want to slow water down, can I stack the 2 and 3 stop filter?  Will there be any downsides like vignetting from this?  


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3 years 2 months ago #543298 by garyrhook
If we go to Amazon and search for "Cokin P Series" we find that one can purchase a holder that accommodates 3 filters:

Cokin CBP400A P-Series Holder


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3 years 2 months ago #543353 by Joves
Vignetting from stacking them no. Really is a case of if the lens is a wide, and has some in the first place. In that case it would accentuate that. I personally hold them in place with my hand, since I am not into doing really long exposures of water.


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3 years 1 month ago #543425 by Shadowfixer1
You can stack as many as you want. The vignetting only occurs if the edge of the filter isn't large enough to cover the angle of view of the lens.

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3 years 1 month ago #543456 by Finn
You'll be fine.  Just pick up their filter bracket and you'll be all set. 


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3 years 1 month ago #544666 by effron
Why stack a two and a three when a six is available?
Joves is also correct, vignetting will result from a wide lens. I use a Lee holder, and my 16-35 f/4 will vignette at 16mm....

Why so serious?
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3 years 1 month ago #544815 by garyrhook
What if you want to combine a three and a gradient? Wouldn't that be a reasonable scenario?


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3 years 1 month ago #544823 by Bryston3bsst
I'll be the dissenter.........

Every piece of glass in front of any lens is not a positive thing.


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3 years 1 month ago #544969 by Joves

garyrhook wrote: What if you want to combine a three and a gradient? Wouldn't that be a reasonable scenario?

I have done it with no problem to pull certain elements out in a scene. Mostly to get better light beams in the shadow area with the GND making the sky darker for effect.


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3 years 1 month ago #545321 by Monti Leehsu
Screw on filters will create vignetting if you stack them depending on how wide the lens is.  I've had this happen to me.  Now if you go wide with reducer, then that's another story.  


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