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#21
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Polarizer filter
Bob Salomon wrote: In article , Ken Weitzel wrote: schuetzen - RKBA! wrote: ;o)-max- wrote: Get a circular you will be on tha safe side, they work on all cameras, don't worry, that book has made a mistake. Which brand, either will do the job fine, there are special effects polarizers too. ;o)-max- buy both so that you can tell us which of these guys know what the heck he is talking about. fwiw and just as confused. chas ... Hi... Maybe it would help all of us if I ask about this... I have a set of Polaroid sunglasses. Maker is Polaroid, and they're polarized. Wearing them I don't see glare on the water, and I don't see whatever you call those glare hot spots (water mirages) on the highway on a real hot real bright sunny day. If I take them off and rotate them in front of my eyes I can watch it slowly reverse. (Instead of no glare, I see even more glare) Are these, then, circular? Ken No. Circular does not refer to either the shape or the act of rotating the filter. All polarizing filters are rotated during use to the desired effect. A circular polarizer is constructed differently than a linear polarizer. The circular has a quarter wave plate sandwiched behind the polarizing foil that allows some light to enter the lens that is circularly polarized so it can be properly utilized by cameras that utilize a beam splitter behind the lens to use the metering system, the auto focus system or to properly display the finder readouts. Both a linear and a circular polarizer use the same polarizer foil and perform identically other then the difference in construction. Since they perform the same purpose the circular can be used on cameras with or without a beam splitter in the camera. A linear polarizer, however, will not allow the metering/AF or finder displays to work properly on those camera systems under all lighting conditions so their use is for use on cameras without the beam splitter. Thanks Bob. That clears it up for me at least Guess that the clear cut answer then is to patronize one of our local shops rather than the internet, carry my camera in with me, ask if I can try one of each in the store (and out the window) Take care. Ken |
#22
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Polarizer filter
In article , Ken Weitzel
wrote: ask if I can try one of each in the store (and out the window) No. You simply have to ask the dealer which type is recommended by the manufacturer. Doing it your way will only tell you both would work under that lighting condition. Or ask the manufacturer of your camera. Or check the instruction book or the list of available accessories for your camera. -- To reply no_ HPMarketing Corp. |
#23
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Polarizer filter
In article , Phil Stripling
writes "Sampson" writes: Phil are you saying that software can do it now and no need for a polarizer? I have read this is the case from some but have also been wondering if this is really true. Sorry, no. It's just a simple question of what problems the original poster is trying to solve using a polarizer. He didn't say he had any problems to solve! -- Jeff Taylor |
#24
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Polarizer filter
In article , Jeff Taylor
wrote: In article , Phil Stripling writes Sorry, no. It's just a simple question of what problems the original poster is trying to solve using a polarizer. He didn't say he had any problems to solve! _That_ may be a problem. If he has no problem to solve, what does the polarizer add to his repertoire? We could all buy starlight twinkle filters and fog filters, too. If I buy a filter, I expect to have some problem that this particular filter will solve. (I have a polarizer, by the way, and it solves the problem for me.) -- Philip Stripling | email to the replyto address is presumed Legal Assistance on the Web | spam and read later. email to philip@ http://www.PhilipStripling.com/ | my domain is read daily. |
#25
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Polarizer filter
In article , Phil
Stripling writes In article , Jeff Taylor wrote: In article , Phil Stripling writes Sorry, no. It's just a simple question of what problems the original poster is trying to solve using a polarizer. He didn't say he had any problems to solve! _That_ may be a problem. If he has no problem to solve, what does the polarizer add to his repertoire? We could all buy starlight twinkle filters and fog filters, too. If I buy a filter, I expect to have some problem that this particular filter will solve. (I have a polarizer, by the way, and it solves the problem for me.) I guess it's just down to words :-) For me, I use my polarizing filter to enhance photos (more saturated colours). Not a problem - just adds to the pic Regards, -- Jeff Taylor |
#26
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Polarizer filter
In article ,
Phil Stripling wrote: may be a problem He could just be looking to creatively make something better. A polarizer can do that by reducing glare, darkening skies, making clouds whiter, etc. A star filter can do that by adding an effect to a spectral highlight(s). A lenticular filter can add eyecatching effects to spectrals. These are not "problems" that are being solved. They are creative solutions to improving an image in camera. Some of these effects can simply not be done in software as quickly, if at all. -- To reply no_ HPMarketing Corp. |
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