View Full Version : Different PL and Uv filters?
21st of June 2006 (Wed), 21:54
Looking for a PL and UV filter.
There seems to be two types of filter... like a circular and is is di-polar or something? Does that refer to the 'pattern' of the filter? Which is best, if there is a best?
22nd of June 2006 (Thu), 02:30
There's two types of polarisers - linear and circular polarisers. The descriptions don't refer to the shape, but to the way the filters are put together. A circular polariser contains an extra element (typically a quarter wave plate) which turns the linearly polarised light into circular polarised light.
For any type of autofocus SLR, digital or film based, you need a circular polariser. At some polarisation angles, a linear polariser will disrupt autofocus or metering.
22nd of June 2006 (Thu), 03:41
How about for a pro-sumer/EVF camera?
22nd of June 2006 (Thu), 04:31
A linear polariser will work on many compact cameras, but I'd still go for a circular polariser. You know there'll be no compatibility issues, and if it's a size that will fit an EF mount lens (such as 58mm) you'll have a suitable filter if you ever buy a DSLR.
22nd of June 2006 (Thu), 20:30
It's 55mm :(
Mayber getting an SLR next year too... :)
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