quick question about circular polarisers

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buckster5

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Kristian
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Hi everybody

Ive just come back from a couple of days in Whitby, where my camera has been in and out of its bag quite a bit! The skies kept on going from being cloudless and clear blue, to being overcast. Being new to DSLR's, ive done a fair bit of reading up, and know that CP filters have little or no effect if the sun is infront or behind, but work best at around 90 degrees. This in mind I was quite frequently changing my filter from a CP to a UV one.

My question is, in the scenario that a CP filter would have no real effect, is it worth just leaving it on regardless, or would you advise changing it for the UV? I was unsure as to whether or not it could have a negative effect and ruin what would have been an 'ok' picture (i say ok because i dont think i am good enough yet to have got any good ones!)

Thanks in advance for your replies ;)
 
I would just leave it on, I was in York a week or so ago and left it on the whole time regardless of the position of the Sun....if it was out.
 
Leave the CPL on. A UV does nothing (it's only for protection, or for film use).

A polariser usually does something noticeable to a blue sky, even if it's not at max effectiveness, except when shooting straight into the sun, eg sunset. In addition, it will cut reflections from foliage etc which makes landscapes richer.

You can moderate the effect with rotation, or just take it off. Certainly it won't do any harm leaving it on, but it will eat a couple of stops of light even when it's doing nothing.
 
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