CPL for 17-40L & 10-22

Tsmith wrote in post #6023569
John I've had the Hoya and now the B+W and always just look through the viewfinder while rotating the filter for the desired amount of polarization. Often times its better to back off the full effect. The filter works great eliminating glare on a water surface too.

On a side note many people have stated how much easier it is to clean the B+W over the Hoya. For me its been the exact opposite of that.

Toney, thank you for the numerous pointers. I'll give that a go. When I got home this evening, I quickly attached the CPL and took a couple shots outside and gave the filter a couple of spins while looking through the viewfinder. To be quite honest, it was extremely difficult to tell the difference spinning it. However, thinking back, I clearly wasn't even close to 90-degrees with the sun when I had the filter on the lens...probably more like 120-degrees. That probably explains the issues with rotating the filter.

I did notice a profound difference rotating just the filter earlier this evening right before sunset, so I think I've got it pretty much squared away.

RE: Cleaning filters
I too remember hearing that the Hoya's were much easier to clean than the B+W's. Any recommendations (especially for fingerprints/smudges)?

Even if the B+W's are harder to keep clean, I still think it was the right choice, especially given the fact that the Kaesemann is a sealed design. I will definitely be putting this to good use in SD, as the wind just about never stops! Be it dust or snow, it will be nice not having to worry about junk & moisture getting between the polarizer foil layers.

Use it in the morning, mid day and evening, you'll quickly learn its capabilities.

Its just the opposite John as the Hoyas are the ones everybody complains about being hard to keep clean. Mine was relatively easy as compared to the B+W I know have. Currently I'm using Giottos Optical Solution. First applied to lens tissue paper then finished with a microfiber cloth. Mine got quite dirty at times in Glacier National Park recently but it certainly didn't have any affect on my photos that I can tell.

Nikon makes a very good 77mm slim CPL that will work with a standard lens cap.

Tsmith wrote in post #6023753
Use it in the morning, mid day and evening, you'll quickly learn its capabilities.

Its just the opposite John as the Hoyas are the ones everybody complains about being hard to keep clean. Mine was relatively easy as compared to the B+W I know have. Currently I'm using Giottos Optical Solution. First applied to lens tissue paper then finished with a microfiber cloth. Mine got quite dirty at times in Glacier National Park recently but it certainly didn't have any affect on my photos that I can tell.

Can't you use a CPL for best effect anytime of day if facing pretty much north or south and any direction around noon?

Depends on latitude and time of year. North's fairly safe in the Northern Hemisphere; South will be problematic especially at high latitudes and in the winter months. Just the opposite will apply in the Southern Hemisphere.

Should you remove a CPL if you're shooting on a bright day, but are not facing in the optimal directions for the CPL?

Not necessarily John. I have a tendency to leave mine on a lot while removing it late in the evening.

They work great for reducing glare in green foliage on bright sunny days.

I figured, at worst, it made no difference, and at best, would help.

Speaking of which, I spent most of yesterday shooting around the Austin, TX area trying out my new CPL. I left it on the entire time. There were only a handful of times where my location in relation to the sun really allowed the CPL to stretch its legs, but even then, I really like the added contrast & saturation the CPL added to other shots.