Re: LX/circular or linear polarizer
The metering will be off depending on the position of the polarizer by up to 1 1/2 stops if I remember correctly. It's not impossible to work with a liner polarizer on an LX but the circular are much easier. Reg Wiest wrote: It¹s slipped my mind . . . Does the metering system in my LX require the use of a circular polarizer or will a linear one work nicely. Thanks, RW -- I can understand why mankind hasn't given up war. During a war you get to drive tanks through the sides of buildings and shoot foreigners - two things that are usually frowned on during peacetime. --P.J. O'Rourke
Re: LX/circular or linear polarizer
Only the speed indication in the finder will be off (depending on the position of the filter). The actual exposure will be fine, as it is not affected by the half-transparent mirror (it is only determined after the mirror has moved up). Regards, Sven -Ursprüngliche Nachricht- Von: Peter J. Alling [mailto:[EMAIL PROTECTED] Gesendet: Montag, 7. Februar 2005 19:57 An: pentax-discuss@pdml.net Betreff: Re: LX/circular or linear polarizer The metering will be off depending on the position of the polarizer by up to 1 1/2 stops if I remember correctly. It's not impossible to work with a liner polarizer on an LX but the circular are much easier. Reg Wiest wrote: It¹s slipped my mind . . . Does the metering system in my LX require the use of a circular polarizer or will a linear one work nicely. Thanks, RW
Re: LX/circular or linear polarizer
With linear polariser the exposure display will be a bit off but the actual OTF exposures will be correct. All the best! Raimo K Personal photography homepage at: http://www.uusikaupunki.fi/~raikorho - Original Message - From: Reg Wiest [EMAIL PROTECTED] To: Pentax discussion group pentax-discuss@pdml.net Sent: Monday, February 07, 2005 8:37 PM Subject: LX/circular or linear polarizer It¹s slipped my mind . . . Does the metering system in my LX require the use of a circular polarizer or will a linear one work nicely. Thanks, RW
Re: LX/circular or linear polarizer
- Original Message - From: Reg Wiest Subject: LX/circular or linear polarizer It¹s slipped my mind . . . Does the metering system in my LX require the use of a circular polarizer or will a linear one work nicely. In manual exposure, it can be a problem, in auto exposure, it can be a problem when shutter speeds exceed the sync speed. Best is to use a circular polariser. William Robb
Re: LX/circular or linear polarizer
Only true in automatic mode. Nick -Original Message- From: keller.schaefer[EMAIL PROTECTED] Only the speed indication in the finder will be off (depending on the position of the filter). The actual exposure will be fine, as it is not affected by the half-transparent mirror (it is only determined after the mirror has moved up). Regards, Sven -Ursprüngliche Nachricht- Von: Peter J. Alling [mailto:[EMAIL PROTECTED] Gesendet: Montag, 7. Februar 2005 19:57 An: pentax-discuss@pdml.net Betreff: Re: LX/circular or linear polarizer The metering will be off depending on the position of the polarizer by up to 1 1/2 stops if I remember correctly. It's not impossible to work with a liner polarizer on an LX but the circular are much easier.
Re: LX/circular or linear polarizer
That's assuming he's using the automatic setting, I usually use manual adjustments. I guess I should have made that clear. keller.schaefer wrote: Only the speed indication in the finder will be off (depending on the position of the filter). The actual exposure will be fine, as it is not affected by the half-transparent mirror (it is only determined after the mirror has moved up). Regards, Sven -Ursprüngliche Nachricht- Von: Peter J. Alling [mailto:[EMAIL PROTECTED] Gesendet: Montag, 7. Februar 2005 19:57 An: pentax-discuss@pdml.net Betreff: Re: LX/circular or linear polarizer The metering will be off depending on the position of the polarizer by up to 1 1/2 stops if I remember correctly. It's not impossible to work with a liner polarizer on an LX but the circular are much easier. Reg Wiest wrote: It¹s slipped my mind . . . Does the metering system in my LX require the use of a circular polarizer or will a linear one work nicely. Thanks, RW -- I can understand why mankind hasn't given up war. During a war you get to drive tanks through the sides of buildings and shoot foreigners - two things that are usually frowned on during peacetime. --P.J. O'Rourke
Re: LX/circular or linear polarizer
- Original Message - From: Nick Clark Subject: Re: LX/circular or linear polarizer Only true in automatic mode. The LX is a bit tricky this way because of the way the meter integrates into the exposure control. In all manual exposures the metered exposure is taken through the lens. In automatic exposure higher than sync (1/75th second) the automatic exposure is finalized off the leading shutter curtain after the mirror raises, although the indicated exposure is still taken off TTL metering. When the shutter speed falls below the sync speed, automatic exposures are indicated via TTL metering, the initial exposure is finalized off the leading curtain, but the exposure will be modified by light reflecting off the film. Consequently, using a linear polarizer can cause incorrect exposures under the following conditions: manual exposure, and can cause metering errors, but not exposure errors in automatic. Hope this muddifies things a bit. I believe I have contradicted my previous post, I am thinking a bit more clearly now. (shut up, Tom.) William Robb
