As a rule I do not use many filters in my photography. I prefer to capture the image as neutrally as possible and to make adjustments as needed in post processing. While I don’t use filters at all in my underwater or wildlife photography, I occasionally find them useful in landscapes. One of my favorites that I do carry is a circular polarizer, which we’re going to see in action today. The circular polarizer is a physical piece of glass that screws into the threads in front of the lens. The filter is rotated to achieve the desired amount of polarization. Just like polarized sunglasses, a circular polarizer cuts down glare and improves clarity. If you’ve ever worn polarized sunglasses while skiing or fishing, you’ve seen firsthand the significant difference in the optics. Unlike some other physical filters, such as variable neutral density filters, the effect of a circular polarizer is difficult to achieve using photoshop or other editing software. And the results are quite dramatic!
These two images are from a trip to Olympic National Park and the temperate rainforests of Washington state. I used my Canon EOS R5 camera with a 24-70mm F/2.8 lens. The photos were captured less than 30 seconds apart — one with no filter and the second with full polarization. Same shutter speed, same aperture, and minor difference in ISO as full polarization also darkens the image and requires slightly greater exposure settings. I think you’ll agree the resulting images look very different:
The polarized image has greater color saturation and dramatically less glare in certain areas (see the circled areas in both images below). The unfiltered image has more contrast but appears “crunchier” with harsher highlights in the trees, branches, and rocks.
Forest and waterfall scenes are some of my favorite places to use a polarizer for its softening effect and painted look. Which image do you prefer?