albertknappmd Posted February 22, 2007 Share #1 Â Posted February 22, 2007 Advertisement (gone after registration) :confused:Does a circular or for that matter a linear polarizer exacerbate the underlying Infra-red problem for an M8? I thought I saw a thread several weeks ago that opined on this matter but could not find it. Furthermore, the thread was just opinion and not based on any solid scientific premises. Let the serious debate commence.... Link to post Share on other sites More sharing options...
jaapv Posted February 22, 2007 Share #2 Â Posted February 22, 2007 Short answer: yes. Longer answer: IR light is not polarized the way visible light is and not affected by the polfilter. So halving the visible light by cutting it with a polarizer will relatively double the IR light which will retain its original intensity, thus exarcabating the IR contamination. So it means stacking the polfilter on top of the IR filter, with all the attendant problems of stacking filters. However the good news is that a polfilter only works at 90 degrees of the incidence of the light, bringing the combination into the best possible position to minimize any adverse effects, provided a lens hood is used as well. Link to post Share on other sites More sharing options...
albertknappmd Posted February 23, 2007 Author Share #3 Â Posted February 23, 2007 I understand the longer part but can you elaborate on the shorter part? Do you mean that if you stack the polar on top of the UV/IR filter, you get the best of both worlds, namely,polarization without IR exacerbation? Why is the lens hood so critical ? Just because you have stacked filters and are afraid of flare? Don't MRC filters minimize this or am I missing something? Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.