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CIR-PL pic advice
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just started using a Hoya CIR-PL this morning and took a few pics out at Martello Tower in Sutton.
It’s my first time using a polarizer and I’m wondering what the darkness in the sky is caused by….I know the picture is not the best but it’s the best example I have with the polarizer to show this dark patch.
Thanks for you feedback
24mm f/4.0 1/500sec ISO200 WB-Daylight -0.5EV
It’s the polarizer; you are using a 24mm lens on a full frame camera. In these circumstances, the
sky at right angles to the sun will show the effect of a polarizer very obviously, whereas the sky nearer the
sun, and the sky at angles greater than 90 degrees shows the effect much less. Very wide angle
lenses and broad expanses of sky, as here, don’t go well together.I generally don’t go wider than 50m on full frame (or equivalent field of view on other formats) with a polariser,
as rc53 says, the effect varies across the sky.
It can sometimes be hard to detect the effect until you get the photo onto a screen/print, so be careful.I was disappointed to learn this as I bought the polariser with wide angle landscapes in mind, doh!
Martin
An excellent question and two very informative answers. It is one of those situations where we assume that because the filter covers the lens that the effect will be uniform across the whole scene, but alas, not so. Polarised light is difficult to judge visually and in this case it can be seen how the effect falls away. This shot would be a very good example for showing in a tutorial the way polarisers work & how to avoid the pitfalls. Nice shot.
Thanks for the responses all, I guess it’ll be trial an error next time, it’s hard to determine on the back of a camera the full effect or lack thereof. I noticed it on all my shots at 24mm. Oh well gotta get back up there and try again I guess.
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