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04/04/2005 12:26:10 PM · #1 |
Probably a really stupid question but
I was given a polariser filter which fits nicely onto teh front of my 300D.
It rotates and has a little "stalk" sticking out to allow it to be rotated.
Why? What does the rotating do?
Thanks in advance for the numerous helpful replies
Steve
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04/04/2005 12:29:59 PM · #2 |
Gives you different levels of polarization. Try it on a clear day with some blue skies or shot water and turn it. You can make it see through water if it clear enough to catch the fishes. Just spin until the reflections are gone.
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04/04/2005 12:31:42 PM · #3 |
A polarizer works at maximum efficiency when it is at right angles to the direction of the light. The rotation allows you to orient the filter properly. maximum efficiency is not always the "best" setting thouigh, depends on the subject. Id you are polarizing off glare fromw ater, for example, it can look lifeless if you remove 100% of it. Use the viewfinder as your guide and watch the effect as you rotate the filter.
Robt.
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04/04/2005 12:32:58 PM · #4 |
Originally posted by Tallbloke:
Probably a really stupid question but
I was given a polariser filter which fits nicely onto teh front of my 300D.
It rotates and has a little "stalk" sticking out to allow it to be rotated.
Why? What does the rotating do?
Thanks in advance for the numerous helpful replies
Steve |
It either amplifies or diminishes reflections (you want a picture of that fish in the water or one of the circular ripples above it?). It also saturates and desaturates colour (watch the blue of the sky as you rotate), adds or subtracts contrast depending on the degree of rotation.
Best to try it out for yourself and see.
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04/04/2005 12:37:00 PM · #5 |
Originally posted by Tallbloke:
Probably a really stupid question but
I was given a polariser filter which fits nicely onto teh front of my 300D.
It rotates and has a little "stalk" sticking out to allow it to be rotated. |
It's broken. Please send to Faidoi for recycling :P |
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04/04/2005 12:51:21 PM · #6 |
Thanks very much for the replies folks
Seems like i need to play around with it a bit
so £5 for that and a Sepia, a Star and a ND04 filter a a good deal then?
Steve
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04/04/2005 12:57:19 PM · #7 |
If it has a stalk on it may be an older linear polarizer. Is it labeled something like "CPL" or "CirPol" for circulat polarizer? The older, non circular, polarizers are supposedly not compatible with the newer AutoFocus systems found on digital cameras.
Even if the polarizer was not included, you got a good deal.
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04/04/2005 02:52:16 PM · #8 |
the only markings on it are 58mm polariser uk
it did come froma whole case of stuff that had an old 70's looking Olympus SLR in it that a mate was trying to sell but couldn't.
What do you mean by "not compatible with Autofocus"?
I used it this afternoon without knowing what the stalk thingy did with varying degrees of polarising success. The focus seemed fine though?
Steve
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