DSLRs: CPL filter effects

Beyond being just a VP of Technology at Newstex, and a published author on cloud computing, I also enjoy tinkering around with my DSLR:


This thing is absolutely amazing. I've been able to get some pretty amazing shots, and I've learned so much about photography from a hands-on approach. Since we're season ticket holders to both the Rochester Red Wings (minor league baseball), and the Rochester Americans (AHL Hockey), I've been doing a lot with sports photography. The first Amerks game was this past Saturday, and I've learned to absolutely love the CPL Filter that I recently purchased. This filter has some pretty amazing effects when you are trying to shoot photos through a reflective surface such as Glass.

Here's a shot without the CPL filter. Notice the reflection of the people sitting behind us. You can clearly make out the blue shirt in the upper left quadrant of the picture.

No CPL filter

Then attaching the CPL filter and adjusting it appropriately, this reflection almost completely disappears:

CPL Filter Removed the reflection

Although it did significantly reduce the amount of light that got through, it also made the resulting picture a lot more clear by removing that reflection. It's pretty amazing that you can actually see this reflection being removed as you're adjusting the CPL filter. Looking through the eyepiece, I was able to spin the CPL filter and see the reflection come into focus, and then disappear.

The reduction in light meant that I had to turn down the shutter speed or increase the ISO sensitivity. It's very important in sports-action photography to have as high of a shutter speed as possible, so I chose to increase the ISO sensitivity to about as much as I'm comfortable with (3200). This does increase the "grainy-ness" of the photos slightly, but it's better to have a slightly grainy photo then a blurry one.

Of the filters that I bought, this so far is the only one that has an absolutely clear and positive effect. The UV filter that I used during Baseball season simply acted as a "protection layer" for my lens. There's something very magical about seeing a reflection simply disappear literally right in front of your eyes.
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