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One of the members had recommended the Freewell variable ND filters rather than the single strength filters. The advantage is obvious. Are there any disadvantages?
It was not your thread that I referred to and don’t recall seeing it. @THE CYBORG made a comment about them in passing in the CODEC discussion. I wouldn't has asked my "additional question" in a new thread had I seen your previously. Perhaps there might have been a kinder way for you to say it, and perhaps include the link to your thread?You mean besides the vignetting / polarization (uneven coverage across the frame) that I mentioned in that thread already?
Why create a brand new thread for your additional question?
It was not your thread that I referred to and don’t recall seeing it. @THE CYBORG made a comment about them in passing in the CODEC discussion. I wouldn't has asked my "additional question" in a new thread had I seen your previously. Perhaps there might have been a kinder way for you to say it, and perhaps include the link to your thread?
It was not your thread that I referred to and don’t recall seeing it. @THE CYBORG made a comment about them in passing in the CODEC discussion. I wouldn't has asked my "additional question" in a new thread had I seen your previously. Perhaps there might have been a kinder way for you to say it, and perhaps include the link to your thread?
I get no vignetting / polarization after all they aren't a polarizing filter.
They aren't a polarizing filter, but they get the variable effect due to the way they work, which is similar to polarization (but not the same kind of polarization that we think of in PL filters to cut reflections).
From the following article:
"A variable ND lens filter blocks out light as a result of the way the filter is made. Variable ND filters consist of two circular, polarising layers of glass that are placed in opposition to each other. The inner layer screws onto the camera lens and stays fixed. The outer layer is attached to a ring at the front of the filter frame and can be rotated. "
What is a Variable ND Filter And When Should You Use One? | Urth Magazine
Discover what variable ND lens filters are, how to use them and how they can help you achieve the beautiful shots you’ve always wanted to capture.mygobe.com
I'm not saying they shouldn't be used, and there are probably produces of varying degrees of quality (the ones you use may be relatively decent quality). It is simply my choice to not introduce possible degradation of image fidelity.
Edit: and the OP of this thread asked for possible disadvantages
Chris
Apologies, I assumed you came from a different thread. Yes, I could have provided a link to the thread I spoke of.
My comments on VND vs fixed are in post #4 of this thread:
ND filter changing speed
Cheers, Chris
Chris makes a good point.....It is simply my choice to not introduce possible degradation of image fidelity.