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12-12-2007, 08:50 PM   #1
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does k10d need circular filters

Hi all. what kind of polarizing filter will work with my hood on I have a k10d with the 18-55mm lens thanks .steve


Last edited by pentaxk10duser; 12-12-2007 at 09:48 PM.
12-12-2007, 11:27 PM   #2
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QuoteOriginally posted by pentaxk10duser Quote
Hi all. what kind of polarizing filter will work with my hood on I have a k10d with the 18-55mm lens thanks .steve
Circular polarizers cost more than standard, but the manual insists that AF and AE will suffer with a standard polarizer. I don't take any chances on blowing the shot, so I pay the extra. No, I'm not rich. Look at my sig. I'm broke! I just bought that whole third line. If I buy a $20 UV filter now I'll have to declare bankruptcy.

But it's worth it.
12-12-2007, 11:45 PM   #3
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Generally speaking Circular Polarizer cut down on the polarizing effect as a trade off for allowing most autofocus systems to work thru the filter. Linear polarizers have a more pronouced polarizing affect, but I've never had a problem using them on a Canon 300D or 20D, nor have my co-worker ever had a problem using a linear polarizer on his *ist DS2.

In the 8 years I've worked in camera (and related) sales, I never heard of a linear screwing with the auto exposure any differently than circular polarizer. Both will create about 2 stop loss of light obviously.
12-12-2007, 11:59 PM   #4
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Circular polariser is essential no matter what cameras you use. A great way to get the best colour of the scenery at times.

12-13-2007, 03:23 AM   #5
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QuoteOriginally posted by roentarre Quote
Circular polariser is essential no matter what cameras you use.
I don't understand why you said that.
Unless you have a beam splitter for metering or autofocus a linear polariser is fine and gives the same result as a circular polariser.
A circ pol is by no means "essential" with many cameras.
12-13-2007, 03:41 AM   #6
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usually you use the polarizer with the hood off. when the hood is on it's hard to change the strength of the polarizer.
12-13-2007, 11:37 AM   #7
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QuoteOriginally posted by TheWengler Quote
usually you use the polarizer with the hood off. when the hood is on it's hard to change the strength of the polarizer.
This is not necessary with OP's 18-55mm lens. The lens hood has a "Polarizer window" (a unique clever Pentax feature). You just remove the sliding tab in the hood and you can adjust the polarizer.
12-13-2007, 12:34 PM   #8
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QuoteOriginally posted by nosnoop Quote
This is not necessary with OP's 18-55mm lens. The lens hood has a "Polarizer window" (a unique clever Pentax feature). You just remove the sliding tab in the hood and you can adjust the polarizer.
Yeah my 16-45 has the same thing. It actually says in the manual not to leave it open for maximum effect. It makes sense to close it if you shoot in portrait orientation, but probably doesn't matter much in landscape orientation. However, it defeats the purpose if you have to constantly open and close that window.


Last edited by TheWengler; 12-13-2007 at 04:18 PM.
12-13-2007, 03:37 PM   #9
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I can recommend the Hoya Pro 1 D circular polariser - mine is pretty much permanently on the camera - no vignetting even at 17mm (on a sigma 17-70 lens)

simon
12-13-2007, 03:46 PM   #10
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D'oh! If only I'd known that was what the tab was for....i was getting annoyed on my cruise, either keeping the hood off or being happy I was using the lens without the polarizer.

Live and learn LOL
12-16-2007, 10:44 PM   #11
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Original Poster
Thanks every body, I guess I have a lot to learn because I don't know what the heck you all said ,except for simonkit the first part any ways ,the no vignetting Ill have to look into that to see if I need that or not .Thanks again for your help, Steve
12-17-2007, 07:33 AM   #12
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Amazon.com: Used and New: Tiffen 52mm Photo Essentials Filter Kit As I new user myself, I picked up this set with Adorama as the merchant. Haven't had any complaints and the price isnt' bad at all.
12-17-2007, 10:59 PM   #13
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I just recently purchased a new Hoya Circular Polarizer and am just wondering how to properly adjust the "circle". There doesn't seem to be any markers on how much you will be filtering by adjusting the "circle". However with the few snaps that I took, there really does seem to be an improvement ie bribght objects don't wash out neighboring objects.
12-17-2007, 11:04 PM   #14
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Just turn it until you get the effect you like best. The closer you are to 90 degrees from the sun, but better the results.
12-18-2007, 11:28 PM   #15
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Jodokast96, can the polarizer be kept on the camera lens at all time ie indoors or is it mostly used for outdoor photography? I was also wondering if you can actually see the difference on your camera's LCD or will you only be able to see the difference once you transport the images onto the computer? TIA.
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