Do these filters have any optical coating on them? Can they be stacked onto each other or have other filters attached?
1854976
All filters have an optical coating. It is possible to stack this on or under other filters.
1598868
I don't know anything about any filters, I'm no help. Hope you can get your answer questioned.
2167665
No they are not, they are made out of very thin paper, not great. Ok, If you can't find the original filters, Good luck on your quest :)
1279246
the stacking of filters may cause vignetting, but should not affect sharpness.
1398962
I don't believe they are. They do not have the markings as the filters I received with my unit.
141048
In the six pack, each filter is individually wrapped. In the two pack, they are wrapped together, so I put the second one back into the shipping box for storage until needed.
12010
The filters in this set are ND2, ND4, and ND8 but they can be stacked to give you what you are looking for.
274848
I have been ordering these for a few years now and my experience has been mixed. Sometimes it comes with the blue plastic wrap and sometimes not. It does not matter to me. I do not see any difference in the filters themselves.
1279250
I would not stack more than 2 filters. There probably won't be any effect on sharpness, but you could get vignetting depending in the lens. Try it, if it works fo9r you, it's OK.
1807329
Yes, the White and Black filters are used in tandem. The White screws onto the Black.
1346401
I believe they are glass. They certainly appear to be. I have the polarizing filter permanently attached to my Nikon 7700 and I'm very happy with it (esp. considering the price).
2187824
Yes, there is a outer threads on. But this filter doesn't polarize very much. We think to sell it.
386292
Sorry I can't help, I never use them, I have indirect lighting in the rooms I use my monitors in.Good luck, I know there are some nice filters out there, co-workers of mine have had them in the past.
1798708
The packaging says it is fully coated...w/ ultra clear glass ensuring color balance is mainted. (ck out this ref. for more info: http://www.ourgreatshop.com/Hoya-40-5mm-HMC-UV-C-filter-P3864.aspx
80294
Mines Black and takes 2 filters stacked. Better measure the inside diameter of the filter housing where the seal sits.
2163744
The answer is "no." The filters I use have threads have threads on both sides. Most of them do so this shouldn't be a problem.
2086831
Filters came with mine although I know that at least one reviewer said theirs came without. Maybe it depends on which seller you buy from?