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-   -   Filters: CPL = NDx? (https://forums.steves-digicams.com/kodak/99760-filters-cpl-ndx.html)

inneyeseakay Sep 1, 2006 12:46 PM

I have heard that you can use a PL filter just as you would an ND filter, but I was wondering how many f/stops it would cut... Would it be more like an ND2 or ND4?

Boily Sep 1, 2006 4:01 PM

The polarizer will cut the flares and the ND will not...

I don't know for the F stops but I have a ND2X and a Circular polarizer and they do almost the same effect on the F stops !!

inneyeseakay Sep 1, 2006 5:43 PM

1 Attachment(s)
Well... I was asking because I took a trip to a park nearby that happens to have a waterfall (manmade) in it. This is what I came up with...

domang Sep 1, 2006 6:08 PM

That's a nice picture.

The Exif data is there:

[Image]
Make = EASTMAN KODAK COMPANY
Model = KODAK P850 ZOOM DIGITAL CAMERA
Orientation = top/left
X Resolution = 230
Y Resolution = 230
Resolution Unit = inch
Software =
YCbCr Positioning = centered
Exif IFD Pointer = Offset: 364
A401 = 0
A402 = 0
A403 = 0
A404 = 0/100
A405 = 54
A406 = 0
A407 = 0
A408 = 0
A409 = 0
A40A = 2
A40C = 0

[Camera]
Exposure Time = 1/3"
F Number = F8
Exposure Program = Shutter priority
ISO Speed Ratings = 50
Exif Version = Version 2.21
Date Time Original = 2006-09-01 17:26:06
Date Time Digitized = 2006-09-01 17:26:06
Components Configuration = YCbcr
Shutter Speed Value = 1.33 TV
Aperture Value = 6 AV
Exposure Bias Value = -2EV
Max Aperture Value = F3.03
Metering Mode = Pattern
Light Source = unknown
Flash = Flash did not fire, compulsory flash mode
Focal Length = 8.9mm
Maker Note = 4390 Byte
Flashpix Version = Version 1.0
Color Space = sRGB
Exif Image Width = 2592
Exif Image Height = 1944
Exposure Index = 50
Sensing Method = One-chip color area sensor
File Source = DSC
Scene Type = A directly photographed image

[Thumbnail Info]
Compression = JPEG Compressed (Thumbnail)
Orientation = top/left
X Resolution = 72
Y Resolution = 72
Resolution Unit = inch
JPEG Interchange Format = Offset: 5270
JPEG Interchange Format Length = Length: 7961

[Thumbnail]
Thumbnail = 160 x 120


bigdawg Sep 2, 2006 1:02 AM

I always figured the polorizer was about 1 stop and the ND filters were a stop per number! ND4 =4 stops! Probably wrong there but I try not to go that in depth with this stuff and just use it! I don't know how but it usually works for me!

Dawg without a clue! That would be clueless wouldn't it???? LOL

Morag2 Sep 2, 2006 10:58 AM

Haha, Dawg, I think your ND4 = 4 stops is a bit off.

An ND 0.9 is what I'm getting, and thats 3 stops :blah:

dan279 Sep 2, 2006 2:26 PM

Here's the info from B+H
glass ND filter .3 = 1 stop
.6= 2 stops and so on
3.0= 10 stops
these are uncoated glass filters, if multicoated they will cut even more.

For comparison, an uncoated glass CP filter= 1.3 stops

Dan



bigdawg Sep 2, 2006 10:38 PM

Stop it now you guys. I'm getting an overload on info!! LOL

Dawg

Morag2 Sep 2, 2006 11:17 PM

Hey there Dawg! Nothing wrong with info! Thats the first kind of thing I look for when I get into something, a week after getting my camera I was already studying Aperature, Shutter Speed, ISO and how to make them work together and such:blah:


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