What about the extinction ratio of the filter?
12698
Hello. I'm not sure what you're referring to with the "extinction ratio" of the filter. If you are perhaps referring to the filter factor - i.e. the amount of f-stop exposure compensation when using the filter with a manual exposure camera or light meter - I believe for this particular filter that value is 1. Tiffen has a small section on Filter Factors you may find helpful here: http://www.tiffen.com/tiffen_edu_camera_filters.html Please let us know if there is anything else we can assist with. Deven Morgan Event Cameras
752657
Who knows? There are better filters out there. The one I got did not come with any paper work that details its campliblities. A monolithic filter or the ones that go in a Berky are good filters. They list exactly what they filter out.
1198221
The size will be the size of lenses filter diameter. The hood should be checked at various focal lengths to determine if image cut-off occurs.
51040
I don't know. But I also felt the filter degraded the quality of the image.
30419
You should probably call the manufacturer. A quick search of Adorama and B&H does not reveal the answer (both sites carry this filter).
311506
Alex, I actually shoot with it a lot outdoors as it cuts any glare and deepens contrast. Great filter!
741649
Bought this a long time ago, but have not used it much - CP filters are very "personal" - you like them or you don't - Some are warmer, some cooler, and the more expensive ones usually don't seem to change the relative color intensities like many of the cheaper ones (which can make the whole picture seem quite artificial). I'm afraid it's pretty much trial and error trying to find something that you prefer. Sorry I can't be of more help.
1055663
I would thank that you would. Have to read all of the spectra for each model # and compare closely, could be an extra coating on the linse, could be minimem focal distence just compare very closely
1858256
this shouldn't interfere with any portion of focusing either in or out of focus regions. If you put this to its fullest setting you will be left with a very close to black out filter. What you will notice its that you will probably have areas off uneven filtering the darker you set the filter.
1279249
Yes Scott, any additional filter you add to a lens will affect the sharpness, but dependent upon the number of stacks, the effect may not be detectable on the photos with the naked eye.
1104030
Carefully read the specs! Some units will specify new electronic processing to almost virtually eliminate the blur you are concerned about; I noticed it right away in the perceptual clarity...you pay a little more but the difference is worth it.
1566851
It is translucent and will filter all colors out, except the color it is. However, it should not affect any focal properties.
395852
I'm unsure. I had another/original media in the filter, and I just changed this one. So, it hasn't been in there long enough to know what happens for changes in color.
1724615
with one of the filters on you can only zoom about half of your full zoom. Also if you don't zoom enough you will see the circle of the adapter until you zoom out far enough.
620882
I don't believe there is an apprecible difference between the filters for digital and film cameras
104453
Mort, It's easier to start with the second number. You'll need 8X (eight times) longer shutter speed for the same level of exposure on the sensor (or film) as you would without the filter. The first number represents the multiple of the f-stop log-density (0.3) with regard to how much light the filter is letting through. Mathematically 0.9 = 0.3 x 3. So this is a 3-stop filter, meaning that it is only letting through (1/2) * (1/2) * (1/2) = (1/8) of the light that hits front of the filter. Notice that the 8 and 1/8 are reciprocals. If the filter was a 3.0-1000X, it would be a (3.0 = 0.3 x 10) 10-stop filter letting in 1/1000 the light and requiring 1000X longer shutter speed for the same exposure level as without the filter - actually this should be 1024X, but it makes the math easier when you have a round 1000. You can of course stack filters, say the 0.9-8X and the 3.0-1000X for example, and you would have a 3.9-8000X, quite dark. Hope that help, Mark
1100757
I threw mine away it was so bad. There is no way that I would recommend this filter to anyone. A very clear dark X banding was across the frame. Don't waste your money on it. The banding completely ruined shots that I used it for on some waterfalls (which is what I bought it for).