Originally posted by gofour3 The Pentax LX needs to use a CPL for manual metering, as a linear will mess up the meter reading. If using the LX in "auto", then you can use either a CPL or LPL.
This is from my LX review:
A special half mirror was added to the LX to make the viewfinder brighter and easier to focus. This mirror is multi coated and acts like a polarizing filter, so if you use a linear polarizer and shoot in the manual mode you could get a messed up meter reading. However in auto (aperture priority) mode you can use either a CPL or LPL, as the half mirror flips up when the shutter button is pressed and the exposure metering is done off the film plane.
Phil.
True enough, that is the only Pentax SLR that doesn't meter off the screen.
I believe the OTF metering only works at slower speeds. I recall reading that above the sync speed, it took it's reading from the leading curtain up to the moment the button was pressed and that was the exposure you got. It was a cool feature, as it would adjust the exposure duration if light conditions changed during it.
I used the feature very successfully at a music awards show shortly after getting my LX.
I did a little gallery dedicated to the LX when I was maintaining the Pentax Users Gallery.
For the curious among us:
https://pug.komkon.org/LX_Gallery/index.html
It looks terribly dated now. That was published in either July or August 2001.