Friday, February 24, 2006

A polarizing filter for the camera

As previously stated, I’ve got a polarising filter.

I’ll skip the physics of polarised light for now and get back to that when I know my stuff properly.

Here are several effects of a polarizing filter:
Blocks half the light from entering- hence requiring longer exposures and/or wider apertures.
Dramatically reduces reflections and glare on most non-metallic surfaces
Improves colour saturation of the sky by darkening the sky


Once installed onto the camera, the glass of the filter can be rotated to filter the desired angle of light polarisation.


Sky colour saturation:


Without filter



With filter, rotated to allow passage of polarised light from the sky (the sky becomes brighter)



With filter, rotated to block passage of polarised light from the sky (the sky becomes darker)



Reflection reduction:


Without filter





With filter, rotated to allow passage of polarised light reflected from the water.





With filter, rotated to block passage of polarised light reflected from the water.




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5 Comments:

Blogger Ah Pek said...

just asking, can't all these effects be achieved by photoshop?

1:01 pm, February 25, 2006  
Blogger Lao Chen said...

Im sure the sky trick is easy to do using photoshop.

The glare reduction might not be so easy, especially if the glare is strong and the content 'below' is dim. The glare overwhelms the details below and i think the loss of information might be too much to recover.

3:35 pm, February 25, 2006  
Blogger sonia said...

Cool!

(That was my instant reaction. ehhe. Btw, mind telling me which hotel was it that u guys wanted to see the poolside so much?)

5:14 am, February 26, 2006  
Blogger 小李飞刀 said...

Wah.. another step towards professional photography. At this rate team malat members wouldnt need to hire a photographer for their wedding photo shoots, not that they'll be needing one anyway..

5:36 am, February 26, 2006  
Blogger Lao Chen said...

Sonia:
Yeah, cool is a nice concise description.

That was Golden Sands. Not really desperate to see the poolside, but we were just curious about it.

Yuan Harng:
Well, most wouldn't be needing one except maybe for Simon, but thats another story...

11:15 am, February 26, 2006  

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