filters

[blizzy]

can someone help explain how these filters work?
circular polariser and ND filter. and what situations are they good for.

what other filters are worth considering to get?

 

[Kei]

http://www.thkphoto.com/catalog/hoya.html
http://www.camerafilters.com/
http://www.schneideroptics.com/filt...ll_photography/

Get them only if you find it useful.