Gear Talk > Lenses

Circular Polarizer

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UOduck23:
Are there any disadvantages to leaving my circular polarizing filter on my 24-70L 2.8 at all times?  My current setup has the polarizing filter directly attached to the lens with a clear filter (the one I bought with the lens just to protect the glass) on top of that.  I figured why not protect the polarizing filter too.  The immediate disadvantage I can think of is that it makes it impractical to take off the polarizing filter for use on my 70-200L 2.8 II.  But are there others?

Thanks in advance.

Canon-F1:
-2 stops less light?

why not another filter to protect the protecting filter?   8)

honest im not strictly against protecting filters but if you use a pol filter you don´t need another filter on top of it.

Policar:
You'll lose 1.3-2 stops of light (as mentioned above) and, depending on the angle, reduce specular highlights.  This can be nice (foliage at noon) or it can ruin skin tones in portraits.  Shooting LCD screens won't work, either.

wickidwombat:
and you cant stitch panoramas properly that are shot with polarisers on it makes the sky go all crazy

dmills:
To put it another way, your nice 24-70 f2.8 and 70-200 2.8 ii becomes an f5.6ish in terms of attainable shutter speed :(

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