Canon Polarizers

[joey_diletto]

When using a circular polarizer, do you have to adjust the exposure control or does the Canon ELAN II do that automatically? Does the Canon ELAN II have a TTL metering system that allows for the compensation of the filter to be automatic?

 

<p>

 

Thanks!

[NK Guy]

All EOS cameras meter through the lens. There is no need for

any exposure compensation on your part when using any filter

that's put over the lens.

[sajeev_chacko]

Well, the title of your questions suggestions something else i.e.

something about <b><i>Polarizers from Canon</i></b> and not concerning

<i>compensation</i> to be done with a polarizer. It would be good if

you give a proper title something like <b>Exposure Compensation for

Polarizer</i>.

[eosdoc]

</b>There are several concerns about using a polarizer on an

EOS camera like the Elan II / EOS 50.<P>

<UL type=square>

<li>Metering of the ambient light and focussing is TTL. Since

this uses internal mirrors,a CIRCULAR-polarizer (CPOL) is

suggested instead of the LINEAR polarizer (POL) filter, even

though it may be the same shape and diameter.

<li>If you use an older EZ series Speedlite flash, the A-TTL

sensor for the preflash is on the flash body, and is NOT TTL.

However, the actual flash exposure <b>IS</b> controlled by

TTL. This means that the pre-flash metering and the distance

scale might be misleading. Assuming a filter factor of 2,

the flash coupling range is approximately one half of the

one indicated on the flash.

</UL>

<P>

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