filters

[LAmind]

I want to buy a polorizing filter for my camera which is an Elmo 1012s-xl. How would i know what size the flter need to be? What determines that? Thanks.

[Alex]

62mm. (I checked my Elmo, it had a filter on it!)

If you use more than one filter, sometimes you can see the round edge of the filter in your shot when in the wide angle position.

So if you ever want to use an ND filter AND a polarizer, stack two 62mm filters and see if you see the edge of the outer most filter. (called vignetting)

If you do, you may want to buy a bump-up ring and use 67mm filters, although the cost for the filters may be signficantly more.

<font color="#a62a2a" size="1">[ August 21, 2002 10:48 AM: Message edited by: Alex ]</font>

[cameraguy]

I you are using the Elmo's built in meter for exposure then make sure you get a circular polarizer.

[Mike Buckles]

Cameraguy is correct...the new edition of Popular Photography has an article on Polarizers, and it suggested using circular polarizers for slr cameras and slides, so I imagine it would be good advice for super 8 as well. mike

[LAmind]

I'm kind of new to filters. What is the difference between a regular filter and a circular one. (ei. cicular polorizer)

[LAmind]

Also, i'm assuming that if I use to filters at a time they will have to be different sizes. For one filter to fit on top of the other it'd have to be a little bigger. Is that right?

[Alex]

Filters can be the exact same size. Just remember to check for "vignetting".

[LAmind]

Two final questions:

What is the difference between a regular filter and a circular one? (ei. cicular polorizer)

What is "vignetting"?

[Alex]

I neglected to put the word vignetting in when I described what it was a couple of posts ago. I went back and added the word in.

Actor and Cameraguy know about circular versus non-circular polarizers. As far as I know, circular means you rotated the filter to get the polarizing effect.

[technicolour]

Hi,

From what Ive read in photo magazines, circular polarisers are best for auto focus lenses, and linear polarisers (non-circular) are best for manual focus lenses.

Alex made a useful comment about using a step up ring and using a bigger filter to aboid vignetting, I would second this advice.