walter23
TPF Noob!
Nytmair said:I just wanted to double check and make sure this is the right filter (the price seemed low so I wanted to see if it would be ok.
For my camera (panasonic fz20) I am going to get an adaptor that allows me to use 62mm filters/lenses. Now, becuase it's not an SLR camera, the lens does not rotate to focus, it's all within the camera. I will be able to use a cheaper/linear polarizing filter becuase of this, correct?
Circular polarizers are exactly the same as linear polarizers (they are orientation sensitive), except that they contain an extra element (some kind of "wave retarder", I'm not too strong in optical physics so I'll leave it at that) that makes circularly polarized light come out the rear end after the linear polarizer does its job. The reason people use them is because sometimes linear polarizers **** with either the autofocus system or the light metering system (can't remember which, or maybe it's both) due to the construction some manufacturers use - which involves linear polarizing elements. I have a very new canon EOS body (elan 7n) and I bought a linear polarizer for it not realizing it could cause interference. Fortunately, it doesn't. Everything works exactly fine, autofocus and metering are both perfect.
In both cases, rotation of the front of the lens means you have to readjust your polarizer.