cirke Posted November 16, 2011 Share #1 Â Posted November 16, 2011 Advertisement (gone after registration) Hi ! Â which best pol filter for Summilux M 1.4/50 Asph and Elmarit M 2.8/28 Asph ? B+W ? Heliopan ? Â Slim for the 28 mm ? Â thanks Link to post Share on other sites More sharing options...
Advertisement Posted November 16, 2011 Posted November 16, 2011 Hi cirke, Take a look here pol filter ?. I'm sure you'll find what you were looking for!
jaapv Posted November 16, 2011 Share #2 Â Posted November 16, 2011 Any linear pol filter. Lars Bergquist will tell you to just turn it until you get the least exposure, I will tell you that I find the Leica swing-out one a joy to use. Link to post Share on other sites More sharing options...
cirke Posted November 16, 2011 Author Share #3  Posted November 16, 2011 the Leica swing-out ?  I have to look  thanks Link to post Share on other sites More sharing options...
01af Posted November 16, 2011 Share #4 Â Posted November 16, 2011 With a linear polariser used in aperture-priority mode on a digital M camera, you will get some over-exposure at times (according to my tests, up to half an f-stop, depending on the situation). To avoid this, use a circular polariser. However, I find myself using a polariser virtually always in manual exposure mode and checking exposure via the histogram ... and when working this style then a linear polariser will be just fine. Â On M lenses with 46 mm (e. g. Summilux-M 50 mm Asph) or 39 mm filter size (e. g. Elmarit-M 28 mm Asph), I am using a 46-55 mm or 39-55 mm step-up ring plus another special 55-77 mm step-up ring, vented for Leica from Heliopan, and on that a 77 mm circular high-transmission polariser, also from Heliopan. Sounds complicated but actually isn't. You can look through the vented 55-77 mm ring from behind so you can see the polarising effect in the viewfinder. Â By the way, Heliopan offers the vented step-up ring also in 60-77 mm size, for use on Summilux-M 75 mm and Noctilux lenses. Â Â The Leica swing-out? I have to look. Have a shot of vodka before looking at the price of that thing Link to post Share on other sites More sharing options...
cirke Posted November 16, 2011 Author Share #5  Posted November 16, 2011 Have a shot of vodka before looking at the price of that thing I found it all the way from Leica  thanks for the tips , I prefer of course circular pol filter, for exposure I have a Minolta, I dont need the body Link to post Share on other sites More sharing options...
jaapv Posted November 16, 2011 Share #6  Posted November 16, 2011 .   Have a shot of vodka before looking at the price of that thing If you need that Leica is the wrong place to be... Link to post Share on other sites More sharing options...
UliWer Posted November 16, 2011 Share #7 Â Posted November 16, 2011 Advertisement (gone after registration) As we recently have had so many postings in this forum telling us that linear polarizers are a no-go, many seem to sell their Leica swing-out models and you find them for quite reasonable prices at different shops and auction sites. Link to post Share on other sites More sharing options...
cirke Posted November 16, 2011 Author Share #8 Â Posted November 16, 2011 thanks Link to post Share on other sites More sharing options...
jaapv Posted November 16, 2011 Share #9 Â Posted November 16, 2011 Why not? They function exactly like circular ones, the difference being that they have a dispersing element after the polfilter to ensure even performance on mirrors like DSLRs have. For the rest the quality difference is zero. A rangefinder has no mirror, so it does not need a circular one. I know 01AF holds the position that there is a 1/3rd stop exposure deviation, but many others, including Leica, disagree. Link to post Share on other sites More sharing options...
Double Negative Posted November 16, 2011 Share #10 Â Posted November 16, 2011 Maybe this article will help - it explains all the options... Polarizers and the M System. Â Personally, I prefer (and recommend) the Leica Universal Polarizer. Easiest to use, but unfortunately also the priciest. Link to post Share on other sites More sharing options...
jaapv Posted November 16, 2011 Share #11 Â Posted November 16, 2011 Hey! You missed one option in your artice: Buy a cheap 77 mm step-up ring and grind the slot yourself. - as good as the expensive commercial solution and it costs 5$ Link to post Share on other sites More sharing options...
cirke Posted November 16, 2011 Author Share #12  Posted November 16, 2011 Maybe this article will help - it explains all the options... Polarizers and the M System. Personally, I prefer (and recommend) the Leica Universal Polarizer. Easiest to use, but unfortunately also the priciest.  thanks for the link I have to find the Leica Goodies "Steps" , I have already all the filters B+W or Heliopan from 95 to 58 Link to post Share on other sites More sharing options...
01af Posted November 16, 2011 Share #13 Â Posted November 16, 2011 I have to find the Leica Goodies "Steps". You don't. Instead, you can buy that very same set of step-up rings (albeit not including that Leica Goodies bag) from Heliopan directly ... or from any photo dealer who carries Heliopan products. Link to post Share on other sites More sharing options...
cirke Posted November 16, 2011 Author Share #14 Â Posted November 16, 2011 ok I shall do it , I have already all the rings from 95 to 58 Â thanks Link to post Share on other sites More sharing options...
Double Negative Posted November 16, 2011 Share #15 Â Posted November 16, 2011 Hey! You missed one option in your artice: Buy a cheap 77 mm step-up ring and grind the slot yourself. - as good as the expensive commercial solution and it costs 5$ Â Very true! Drill two holes, file in between or use a Dremel... Link to post Share on other sites More sharing options...
brill64 Posted November 16, 2011 Share #16 Â Posted November 16, 2011 with the step up to the 77 hood you mention, assuming it has holes for looking at the polarising effect through the viewfinder, wouldn't you need to be wary of bright light-sources behind or above you reflecting back on the inner surface of the polariser and directly into the camera? sorry, a bit long winded.. Link to post Share on other sites More sharing options...
jaapv Posted November 16, 2011 Share #17 Â Posted November 16, 2011 No. Because a pol filter works best with the sun at 90 degrees - and not at all in backlight. Link to post Share on other sites More sharing options...
Double Negative Posted November 16, 2011 Share #18 Â Posted November 16, 2011 Well, he means reflections coming in and bouncing off of the back of the filter - not so much the effect on polarization. Granted, it's not as useful (if at all) with the sun behind you! Â But a good point. I know B+W and Heliopan filters at least are multi-coated on both sides... Link to post Share on other sites More sharing options...
jaapv Posted November 16, 2011 Share #19 Â Posted November 16, 2011 No-but I meant one wouldn't ( or shouldn't) be using a polfilter in lighting situations that would cause such reflections. When a filter can be used, i.e the light at a 90 degree angle, the risk of flare and reflections is minimal. Link to post Share on other sites More sharing options...
Double Negative Posted November 16, 2011 Share #20 Â Posted November 16, 2011 No-but I meant one wouldn't ( or shouldn't) be using a polfilter in lighting situations that would cause such reflections. When a filter can be used, i.e the light at a 90 degree angle, the risk of flare and reflections is minimal. Â Oh, I know - just busting chops. Link to post Share on other sites More sharing options...
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