does k10d need circular filters

SupremeMoFo · 12-19-2007, 06:21 AM

You can leave it on permanently, but due to the way it works, it reduces the exposure by about 1.3 stops (that's what I've been told - ie the exposure value - I know it cuts out light transmission, it's a physics thing) Not so good indoors.

You can see the results when looking through the viewfinder on the camera, on the screen, and on the computer.

Jodokast96 · 12-19-2007, 09:05 AM

What MoFo said, although I've heard it's actually closer to 2 stops. You can use it indoors, but it won't really be doing anything other than acting like an ND filter at this point, so you will need a lot more light to get usable shutter speeds. What I ususally do, is keep it on the lens, and if I need to use it outdoors, I just pop of the lens cap. If I need to use it indoors, I just unscrew the filter with the cap in place.

**Canada_Rockies** · 12-19-2007, 02:43 PM

Originally posted by weaponx525

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.

Sure, you can leave it on. BUT you lose 2 stops of light, so indoors you will lose more jacking up the ISO than you will gain on reflection control.

ChrisA · 12-19-2007, 02:49 PM

I've been slapped down here before for saying this, but what the heck.

You do not need a circular polariser with the K10D.

A linear polariser works fine (I have two - Hoya and Cokin P).

It does not mess up the metering, or the AF.

travis_cooper · 12-19-2007, 02:58 PM

Of course it isn't limited to circular filters only. You just need to decide which is better for you, linear, or circular, and go with that one. Either will work just fine on your camera.

ChrisA · 12-19-2007, 03:49 PM

Originally posted by travis_cooper

Either will work just fine on your camera.

Lots of people don't believe this, because they've read otherwise.

I figure the extra money for the CP is like a fee for not having to do your own research.

wiseman · 12-19-2007, 04:56 PM

Travis said to decide which polarizer is better for you. What kind of difference, image wise, will you obtain between the linear and circular?

**rogerstg** · 12-19-2007, 05:13 PM

Originally posted by ChrisA

I've been slapped down here before for saying this, but what the heck.

You do not need a circular polariser with the K10D.

A linear polariser works fine (I have two - Hoya and Cokin P).

It does not mess up the metering, or the AF.

I know it messes up the focus of a Nikon D70s. Not a huge amount, but most shots are just not as sharp as when a circular polarizer is used. OTOH, folks that shoot jpg and boost sharpness probably would not notice.

pentaxk10duser · 12-19-2007, 06:41 PM

good ? weaponx525 I was wondering the same thing.

mithrandir · 12-19-2007, 10:29 PM

I have used a circular polarized lens indoors, but it will reduce the light to the sensor a few stops. It works well with a flash though, if you are trying to control unwanted shine when photographing people with darker complexions.

KirstenH · 12-23-2007, 06:29 PM

Originally posted by jmdeegan

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

ermmm... what tab are we talking about?

Jodokast96 · 12-23-2007, 07:49 PM

The removable piece from the Pentax lens hoods.

**Canada_Rockies** · 12-23-2007, 10:39 PM

Originally posted by Jodokast96

The removable piece from the Pentax lens hoods.

The one I have butchered cap keepers to not lose when I unclip them.

Jodokast96 · 12-24-2007, 06:13 AM

Yeah, I wish I had thought of that. Mine somehow fell out of my pocket the first time I used it.

stafford588 · 12-27-2007, 10:30 AM

Originally posted by weaponx525

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.

The polarizer is meant for outdoor use, to cut down on glare and reflections. I'd only use it indoors if I were taking photos through windows, otherwise the filter will negatively affect your exposures. When I use a circular polarizer outdoors, depending on the time of day, I can immediately see a difference in my photos.

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12-19-2007, 06:21 AM	#16
SupremeMoFo Veteran Member Join Date: Mar 2007 Location: Queensland, Australia Posts: 668	You can leave it on permanently, but due to the way it works, it reduces the exposure by about 1.3 stops (that's what I've been told - ie the exposure value - I know it cuts out light transmission, it's a physics thing) Not so good indoors. You can see the results when looking through the viewfinder on the camera, on the screen, and on the computer.

12-19-2007, 09:05 AM	#17
Jodokast96 Veteran Member Join Date: Oct 2007 Location: Erial, NJ USA Photos: Gallery \| Albums Posts: 2,134	What MoFo said, although I've heard it's actually closer to 2 stops. You can use it indoors, but it won't really be doing anything other than acting like an ND filter at this point, so you will need a lot more light to get usable shutter speeds. What I ususally do, is keep it on the lens, and if I need to use it outdoors, I just pop of the lens cap. If I need to use it indoors, I just unscrew the filter with the cap in place.

12-19-2007, 02:43 PM	#18
Canada_Rockies Loyal Site Supporter Join Date: Nov 2007 Location: Sparwood, BC, Canada Photos: Gallery \| Albums Posts: 12,385	Originally posted by weaponx525 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. Sure, you can leave it on. BUT you lose 2 stops of light, so indoors you will lose more jacking up the ISO than you will gain on reflection control.

12-19-2007, 02:49 PM	#19
ChrisA Veteran Member Join Date: Feb 2007 Location: London Posts: 393	I've been slapped down here before for saying this, but what the heck. You do not need a circular polariser with the K10D. A linear polariser works fine (I have two - Hoya and Cokin P). It does not mess up the metering, or the AF.

12-19-2007, 02:58 PM	#20
travis_cooper Veteran Member Join Date: Dec 2007 Location: Salt Lake City, Utah, USA Photos: Gallery Posts: 300	Of course it isn't limited to circular filters only. You just need to decide which is better for you, linear, or circular, and go with that one. Either will work just fine on your camera.

12-19-2007, 03:49 PM	#21
ChrisA Veteran Member Join Date: Feb 2007 Location: London Posts: 393	Originally posted by travis_cooper Either will work just fine on your camera. Lots of people don't believe this, because they've read otherwise. I figure the extra money for the CP is like a fee for not having to do your own research.

12-19-2007, 04:56 PM	#22
wiseman Senior Member Join Date: May 2007 Location: Peachtree City, Georgia Photos: Gallery \| Albums Posts: 102	Travis said to decide which polarizer is better for you. What kind of difference, image wise, will you obtain between the linear and circular?

12-19-2007, 05:13 PM	#23
rogerstg Loyal Site Supporter Join Date: Oct 2007 Location: Rhode Island Photos: Albums Posts: 1,168	Originally posted by ChrisA I've been slapped down here before for saying this, but what the heck. You do not need a circular polariser with the K10D. A linear polariser works fine (I have two - Hoya and Cokin P). It does not mess up the metering, or the AF. I know it messes up the focus of a Nikon D70s. Not a huge amount, but most shots are just not as sharp as when a circular polarizer is used. OTOH, folks that shoot jpg and boost sharpness probably would not notice.

12-19-2007, 06:41 PM	#24
pentaxk10duser Senior Member Join Date: Apr 2007 Location: Kentucky Photos: Albums Posts: 165 Original Poster	good ? weaponx525 I was wondering the same thing.

12-19-2007, 10:29 PM	#25
mithrandir Veteran Member Join Date: Nov 2007 Location: Maryland Photos: Gallery Posts: 1,895	I have used a circular polarized lens indoors, but it will reduce the light to the sensor a few stops. It works well with a flash though, if you are trying to control unwanted shine when photographing people with darker complexions.

12-23-2007, 06:29 PM	#26
KirstenH Junior Member Join Date: Jul 2007 Location: Kalfort.be - Belgium Photos: Albums Posts: 34	Originally posted by jmdeegan 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 ermmm... what tab are we talking about?

12-23-2007, 07:49 PM	#27
Jodokast96 Veteran Member Join Date: Oct 2007 Location: Erial, NJ USA Photos: Gallery \| Albums Posts: 2,134	The removable piece from the Pentax lens hoods.

12-23-2007, 10:39 PM	#28
Canada_Rockies Loyal Site Supporter Join Date: Nov 2007 Location: Sparwood, BC, Canada Photos: Gallery \| Albums Posts: 12,385	Originally posted by Jodokast96 The removable piece from the Pentax lens hoods. The one I have butchered cap keepers to not lose when I unclip them.

12-24-2007, 06:13 AM	#29
Jodokast96 Veteran Member Join Date: Oct 2007 Location: Erial, NJ USA Photos: Gallery \| Albums Posts: 2,134	Yeah, I wish I had thought of that. Mine somehow fell out of my pocket the first time I used it.

12-27-2007, 10:30 AM	#30
stafford588 Inactive Account Join Date: Dec 2007 Location: Fenton, MI Photos: Gallery Posts: 28	Originally posted by weaponx525 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. The polarizer is meant for outdoor use, to cut down on glare and reflections. I'd only use it indoors if I were taking photos through windows, otherwise the filter will negatively affect your exposures. When I use a circular polarizer outdoors, depending on the time of day, I can immediately see a difference in my photos.