Looking for a solid ND filter to help slow shutter speed of my photos of running water, etc.
Wondering if there are recommendations or thoughts around use of screw-in type (ie SR Vari-ND) vs slide in type that might use same holder as my grad ND's?
I have already a Cokin Z size holder and assorted variety of grad nd filters, so no need to buy holder for that as a benefit. But the vari-nd style screw in filter seems like it will give me greater flexibility (vs purchasing multiple nd's) and seems most convenient?
Thoughts or suggestions for someone considering this? Thanks Tom
I have the Singh-Ray Vari-N-Duo and love it. But I also have standard fixed circular ND's because the Vari-N-Duo is not the best choice in some situations. I have never tried solid ND rectangular filters but I use the split type Graduated ND's all the time. I would imagine the rectangular solid ND's would be fine too.
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Thank you Ernesto, certainly some things to think about. What might be an example of when you'd find the Vari-N-Duo not the best choice?
I was thinking more of using the square Lepp filters from SR or the Vari-ND....but it seems like the Vari-ND or Vari-N-Duo at least you get multiple range of stops vs the square or 4x6 Lepps, probably need a few of them to get the same range.
I have the 4x6 full ND from SinghRay (2 and 3 stops) that I use alone or in combination in a Z-Pro Cokin holder or in a Lee holder. It works fine and can be combined with grad ND as well. I have even used them in front of a screw-in CPL.
The 4x6 ND created no vignetting at all on DX, even with 10mm focal lenght. I have not tested them yet on my new FX D800 and new FX lenses 16-35 and 24-120.
I also bought the screw-in 9-stop ND filter from Hoya. It is highly regarded as the one that creates the least color shift (a problem with the SinghRay NDs which creates important red color shifts)
One problem I found with the screw-in non-variable 9-stop filter is that it is almost impossible to focus as we see nothing ! I used it only once since I received it and still have to experiment with it, but 80% of my first photos were out of focus even if it was under a clear sunny light!
One benefit of the 'slide' square type is that you don't necessarily need a holder at all. I often hike around with my ND grads (Cokin type) in my pocket. When I need one, I pull it out, hold it in front of the lens, snap my photo and put it away. I have a true holder, but I found it cumbersome very quickly.