Film-Niko
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- Joined
- Jan 22, 2009
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- Multi Format
From a quality point of view the best you can get are the B+W circular polarizer filters type "Käsemann" (KSM), with the MRC nano coating. By far best, most neutral color rendition. And no visible sharpness loss.
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Polarisationsfilter
Zirkularpolfilter Das Standard-Zirkularpolfilter eignet sich gleichermaßen für Analog- und Digitalkameras. Lineare Polarisierung kann bei Strahlenteilung im Kamerainneren (durch Spiegel oder Prismen) die Belichtungs- oder AF-Messung verfälschen. Zirkulare Polarisierung verhindert das, bei sonst...bw-filtershop.de
I can confirm that from my own experience. I can highly recommend them.
There have been several tests in photo magazines in the past confirming that.
I remember such tests in several German print photo magazines (in Germany there are still about 20(!!) printed photo magazines available; that is on a global scale unique to my knowledge).
I think somewhere I even have the tests still in my archive.......
Anyway:
In these tests also sharpness and contrast has been tested. And that is the first you demand from your filter: No visible loss in sharpness and contrast caused by the added filter!!
And that is an area in which the tested B+W and Heliopan filters were top.
Unfortunately that important factor for example was not tested in the test from the lenstip team.