Hoya hd/cpl filter

[weewillo]

Hi team,

I just purchased a Hoya hd/cpl filter for my 15-85mm IS USM.

Should I leave this on the lens at all times???

[thekingb]

I wouldn't keep it on all the time. You'll lose light due to the CPL (up to 2 stops), and that can be trouble when shooting in low light situations. And you can sometimes get an uneven polarizing effect at wide angles (15-18ish) on your EF-S 15-85. It can be a pain to keep changing out filters, but it's worth it.

[Dr Croubie]

Outdoors in the sun, yes.
Indoors it doesn't do much at all (although it can cut reflections off a window).
At night you'll be losing too much light (but then, you can enhance/remove light-reflections off the water, and you'll probably want the light-loss to make longer exposures to blur the water).
And when it's cloudy, it depends on how lazy i'm feeling, it doesn't do much either way.

[weewillo]

Thanks mate.

I'll leave it on during the day and take it off at night!!! Easy!