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Category: New Questions

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Photography Question 
Dan W. Dooley
BetterPhoto Member

member since: 10/28/2005
 

Metering with a Polarizing Filter


I just added a Circular Polarizing filter to my 17-50mm f/2.8 Tamron on my Canon 40D. Is there any need to modify the metering mode of the camera? Most of the time I'm using the Evaluative mode. Should I go more to a center-weighted mode? Or does it matter?

6/15/2009 5:04:22 PM

 
Carlton Ward
BetterPhoto Member
Contact Carlton
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carltonwardphoto.com

member since: 12/13/2005
  Hello Dan,
I love my CP filter. I do quite a bit of waterfall/landscape shots, and it really helps with water reflections, the sky and allowing more detail of darker areas of a scene. I had a cheaper one but opted for the B&W Kaeseman polarizing filter, which isn't cheap but my thought is that I shoot with L glass and do not want to place a cheap optic over my quality lens.
Since I am usually shooting a landscape scene, I use EV a lot (although I don't think it matters too much), but I also manually focus my lens and use a lot of DOF like f/22 or f/32 so that as much of the image is in focus as possible. I rotate the filter to where I like the look of the scene, then check my exposure and adjust for how the CP filter is affecting the exposure.
I always use a tripod/remote shutter release and have lately been doing more multiple exposures for HDR imaging.
Have fun Dan!

6/15/2009 9:31:01 PM

 
Dan W. Dooley
BetterPhoto Member

member since: 10/28/2005
  Thanks Carlton,

I'm going to be on holiday next week in the canyon areas of Utah and felt like the CP filter would be a good tool. Mine is also a B+W as are all my other filters. I was just not sure if there might be a need to adjust the exposure metering covering the frame area. Sounds like that is not the case.

6/16/2009 6:18:03 AM

 
Carlton Ward
BetterPhoto Member
Contact Carlton
Carlton's Gallery
carltonwardphoto.com

member since: 12/13/2005
  Have fun Dan,
I look forward to seeing your images. Landscape galore in the Canyonlands :)
Carlton

6/16/2009 7:27:30 AM

 
Koen Van den Beld
BetterPhoto Member

member since: 6/2/2005
  The short answer is that it doesn't matter at all. Your camera will compensate for the extra loss of light because it also meters through the filter.

6/24/2009 1:51:50 AM

 

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