Premium Member Hunter Hampton Posted December 19, 2008 Premium Member Share Posted December 19, 2008 I should know this but I don't... Is it 1/3 to 2/3 stop? Thanks. Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted December 19, 2008 Premium Member Share Posted December 19, 2008 IIRC my tiffen is 2 stops. . . Might be filter specific though, give a call to your manufacturer, or an e mail to 'em. Link to comment Share on other sites More sharing options...
Tom Hepburn Posted December 19, 2008 Share Posted December 19, 2008 Good question. I have a circular polarizer and Tiffen said, for those numbers the f-stop compensation can vary between 11/2 and 2 f-stops. ? Hoya filter tiffen Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted December 19, 2008 Premium Member Share Posted December 19, 2008 Well split the difference, 1 and 2/3 stop ;) Link to comment Share on other sites More sharing options...
Premium Member Hunter Hampton Posted December 20, 2008 Author Premium Member Share Posted December 20, 2008 (edited) Its a tiffen linear I think so 1 2/3 sounds good then. I'm shooting 7201 so im sure I will be ok. This is my favorite forum because of people like you guys! ;) Thanks. Edited December 20, 2008 by hunter richards Link to comment Share on other sites More sharing options...
Andrew Brinkhaus Posted December 20, 2008 Share Posted December 20, 2008 (edited) You could always note the difference when placing your polo over your meter in incident mode. Edited December 20, 2008 by Andrew Brinkhaus Link to comment Share on other sites More sharing options...
K Borowski Posted December 20, 2008 Share Posted December 20, 2008 1-1/2 to 2 stops sounds right, but also, keep in mind that I believe it depends on the orientatio of the polarizer. In other words, it is shot-specific, not a set factor. Without an in-camera meter (do these even exist on any pro MP cameras?) you'd actually need to meter through a polarizer oriented comparably, I think. Link to comment Share on other sites More sharing options...
Jonathan Bowerbank Posted December 20, 2008 Share Posted December 20, 2008 Which is why you have to shake up that pola with each camera setup. Take it out, note the position, then slap it back on the lens. Link to comment Share on other sites More sharing options...
Premium Member John Brawley Posted December 20, 2008 Premium Member Share Posted December 20, 2008 I should know this but I don't... Is it 1/3 to 2/3 stop? Thanks. It's variable but i usually go for 1 + 2/3 for a tiffen and 2 stops for a tru-pol. jb Link to comment Share on other sites More sharing options...
Premium Member John Brawley Posted December 20, 2008 Premium Member Share Posted December 20, 2008 Without an in-camera meter (do these even exist on any pro MP cameras?) you'd actually need to meter through a polarizer oriented comparably, I think. Not always so easy as most MP polarisers are linear (not circular) and they screw with most meters. jb Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted December 20, 2008 Premium Member Share Posted December 20, 2008 I think my Tiffen is a Circular John or Jonathan can you focus me on that? I always just go 2 stops on it and it seems find for me. If anything 1/2 a stop difference is nothing in todays TK suites. Though, as it's a range of 1.5-2 stops I might start doing 1 2/3 from here on out. Link to comment Share on other sites More sharing options...
Premium Member John Brawley Posted December 20, 2008 Premium Member Share Posted December 20, 2008 I think my Tiffen is a Circular John or Jonathan can you focus me on that? I always just go 2 stops on it and it seems find for me. If anything 1/2 a stop difference is nothing in todays TK suites. Though, as it's a range of 1.5-2 stops I might start doing 1 2/3 from here on out. Im not sure about the circ's. The schneider's were more *polarised* than the tiffens hence the deeper filter factor. The test they used to have was to take two of their polarisers and rotate them together till you get total black. If you did the same with two tiffens you would always be able to still see through them, even at max polarisation. Hence schneider rightly claiming the polariser high ground and calling their polariser's *tru-pol* I know tiffen were going to release a version that performed in a similar way to the schneider's but i don't think it's necessarily linked to weather they are circular or linear. I know schneider also have a 1 stop polariser as well. jb Link to comment Share on other sites More sharing options...
Jonathan Bowerbank Posted December 20, 2008 Share Posted December 20, 2008 I think my Tiffen is a Circular John or Jonathan can you focus me on that? I always just go 2 stops on it and it seems find for me. If anything 1/2 a stop difference is nothing in todays TK suites. Though, as it's a range of 1.5-2 stops I might start doing 1 2/3 from here on out. I would go by Tiffen's own specifications. You can spot meter through it to find out, but it won't be exact, as Tiffen's tests take into count the spectral sensitivity effected by the pola filter, and not just flat exposure value. Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted December 20, 2008 Premium Member Share Posted December 20, 2008 I've found most Polas to be in the 1.5-stop range, which of course is a bit awkward to compensate on your meter by a half-stop unless you combine it with another half-stop loss filter like an 81EF... so I usually round up to 1 2/3 stops for a Pola. I used to just use the Pola interchangeably with the ND.6, but I don't think it really is as dense as 2-stops... Lately I've used a Pola less and less, mainly because now I seem to be noticing more problems with double-reflections from having a 4x5 ND filter or diffusion in front of the round Pola, and that gap between them, even if I tilt the filter. It's annoying, I've been burned a few times in dailies with ghost reflections. The only solution sometimes is to really tilt the filter, more than the tilt tray allows. I wonder if anyone would make a Pola + ND.6 combo filter -- that would come in handy when shooting these newer digital cameras outside. Link to comment Share on other sites More sharing options...
Premium Member Paul Bruening Posted December 20, 2008 Premium Member Share Posted December 20, 2008 Has anyone ever stacked polarizers? Would they cut more wavelengths or just more amount of light? Link to comment Share on other sites More sharing options...
Premium Member Hunter Hampton Posted December 20, 2008 Author Premium Member Share Posted December 20, 2008 I have tried stacking linear polarizers before- it acts like a variable ND. I didn't notice more polarization? Link to comment Share on other sites More sharing options...
Premium Member Chris Keth Posted December 21, 2008 Premium Member Share Posted December 21, 2008 (edited) You can stack them to do stuff like cut two different reflections or get really dark, surreal skies. It will just cut two different polarities of light. I would recommend stacking the filters in the way they'll be used and metering through the pack to come up with a stop compensation. As you turn the filters in relation to each other you can actually get a setting that you can't even see through, I'm not sure if doubling the filter factor would be correct or not. Edited December 21, 2008 by Chris Keth Link to comment Share on other sites More sharing options...
Bernhard Zitz Posted December 21, 2008 Share Posted December 21, 2008 (edited) Has anyone ever stacked polarizers? Would they cut more wavelengths or just more amount of light? http://www.jr-worldwi.de/photo/index.html?...omparisons.html click on polarizer on the lower left. at the bottom of the page you'll find some interesting examples of combined pola-filters... Edited December 21, 2008 by Bernhard Zitz Link to comment Share on other sites More sharing options...
Premium Member Paul Bruening Posted December 21, 2008 Premium Member Share Posted December 21, 2008 Excellent link, Bernhard. Thanks. Link to comment Share on other sites More sharing options...
Shehnad Jalal Posted January 28, 2009 Share Posted January 28, 2009 1-1/2 to 2 stops sounds right, but also, keep in mind that I believe it depends on the orientatio of the polarizer. In other words, it is shot-specific, not a set factor. Without an in-camera meter (do these even exist on any pro MP cameras?) you'd actually need to meter through a polarizer oriented comparably, I think. even if the exposure compensation depends on the orientation of the polarizer, it will still be in between 1 1/2 to 2 stops right? Link to comment Share on other sites More sharing options...
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