The problem with the polarizing filters is that it's front end rotates freely and the palm method is not quite usable. A filter wrench is much better. If not thighten well such a filter may come loose after a while because it may unscrew itself a bit when rotating the front end, and finally fall. I've lost one that way

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Radu
Canon PowerShot S100
Canon 50D , SIGMA 10-20 f3.5 ,Canon EF 24-105 L IS USM, Canon EF 100/2.8 macro Canon EF 50/1.4 ,Canon EF 85 f1.8,Canon EF-S17-85 4-5.6 Old Tamron 28-300 inherited from my Canon Rebel G film camera
Canon580EXII
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