EF-S 10-22mm Circular Polarizer results @ 10mm

[Tsmith]

A few members asked for results in the thread on GND Filters so thought I'd post some results with the Circular Polarizer I use:

http://www.2filter.com/hoya/hoya_images/pro1digital02.jpg

This is the original image straight from the camera shot in RAW at 1/160s f/7.1 at 10.0mm using Auto WB and default XT parameters.

http://www.pbase.com/smith_xt/image/56601627.jpg

This is the same image I adjusted via RawShooter Premium using the Levels option to boost shadows and lighten the sky.

http://www.pbase.com/smith_xt/image/56601209.jpg

[Wilt]

I see no difference between the 2 photos posted!

[Tsmith]

Maybe your monitor needs calibrating. The second one has the shadows boosted but not overly and the sky lightened too.

[mrclark321]

Great shot Bluedog, I have to get me another CP
BTW...I can clearly see the difference. The bricks and the fence are lightened up :)

Dan

[Tsmith]

Thanks Dan _ hope your recovery is goin' well.

I've wondered if the uneven polarization seen in some results at 10mm is magnified if using a standard thickness polarizer vs the slim type I have.

[Wilt]

I see it now, a Subtle change. I was looking for something a little more dramatic, not a 1/6 - 1/3 EV change.

[cfcRebel]

Thanks for posting the sample Bluedog. My step-up ring just came last week. Too bad my 10-22 + slim Heliopan 82mm Cirpol + step-up ring setup gives me vignett problem at 10mm:(. It's fine at 11mm though. Maybe i should sell the 82mm and buy another 77mm CirPol.

[wei328]

I have the same setup, but I would avoid using a CP on wide angle lenses, especially at 10mm.
CP makes the sky too dark on one side compare to the other.

[rklepper]

As wide as this thing is I am surprised you cannot see the filter.

[Mike Bell]

Nice shots and nice PP too. The dark to light blue spread across the sky is caused by the different angles to the sun so I doubt if it is substantially different with thick or thin filters.

I have a standard thickness CP on my 10-22. It does vignette but only when wider than 12mm. As the thin ones cost about 3 times as much I decided I can live with that. The £100 I 'saved' went towards another lens! ;)

[vjack]

I have the same setup, but I would avoid using a CP on wide angle lenses, especially at 10mm.
CP makes the sky too dark on one side compare to the other.

After playing with mine a bit more, I think I'd have to agree.

[Tsmith]

I have the same setup, but I would avoid using a CP on wide angle lenses, especially at 10mm.
CP makes the sky too dark on one side compare to the other.

I agree somewhat but as in those photos the overall one sided corner darkness can be averaged out in PP'ing to where its of a tolerable less desirable result.

That shot by the way is at a direct 90 degree stance from the Sun with the lens Hood attached. Its a bit of a trick adjusting it with the hood but quite doable. I did notice one minor flare spot without the hood.